FeynHiggs: History of the Code
Last update: Jul 1, 2021
What happened (FeynHiggs2.18.1):
- Fixed bug in MW calculation (relevant for
mass-degenerate sleptons). This bugfix is preliminary, as it may
lose a few MeV in accuracy. Thanks go to E. Bagnaschi.
- Fixed bug in EWPO calculation in the case that SLHA was used as input.
Thanks go to E. Bagnaschi for testing.
- Updated default values for AlfaHad and invAlfa0 to 2020 PDG
- Fixed bug in the selection of complex THDM EFT
calculation. This bug led to problems for loglevel = 4
(shifts of O(200 MeV) in Mh, completely erronerous
values for the other neutral Higgs masses).
- Corrected signs of imaginary Yukawa RGEs for complex THDM EFT
calculation. The numerical effect on Mh is negligible.
- Fixed SM input parameters for low tanβ LHCHWG benchmark scenarios
(in the example folder).
- Fixed compiler issue with Ubuntu 20.
Jan 11, 2021
Nov 25, 2020
- Implemented complex THDM as EFT (see
). This EFT calculation
is automatically activated for loglevel = 4 and tlCplxApprox > 0. It is
also used if the EWino mass scale is larger than MSusy. In all other
cases, the real THDM-EFT calculation from
- Implemented the O(αt2)
threshold corrections to the Higgs
self-couplings for the (real and complex) THDM as EFT (see
July 29, 2020
- The top-Yukawa coupling is now by default extracted from the OS
top-quark mass at the 3L level. This leads to downwards shifts
in Mh of ~ 0.5 GeV, see
for more details.
- Implementation of a link to the code Himalaya for the calculation of
O(αt αs2) threshold
for more details. See the README for instructions on how to
activate Himalaya (by default Himalaya is not run).
- Implementation of the full phase dependence for the SM-EFT calculation
(loglevel = 1,2,3). See
for more details.
- Bug fixed in the function
(it gave back the full self-energies before).
- Bug fixed in the O(αt2) threshold
corrections, numerical impact in Mh of O(10 MeV).
- Bug fixed in the renormalization of the one-loop self-energies
(negligible numerical impact).
- Bug fixed in uncertainty estimate of EFT calculation (negligible
February 05, 2020
- Consistently added stop-sector CKM rotation (even in the case of all
NMFV-δ = 0) to all NMFV squarks.
This improves (via the MW2 counterterm)
the decoupling behavior of Γ(h → ff) for large squark
masses and has a (mostly small) numerical impact on the EWPO calculation.
- Bug fixed in non-logarithmic subtraction terms relevant if the
flags looplevel != 0 and loglevel != 0.
The numerical effect on Mh is negligible. Thanks go to Ivan
Sobolev for noticing the bug.
December 18, 2019
- Implemented 2HDM as EFT (activated by setting loglevel = 4). See
for more details. Recommended if MA << MSUSY.
- tanβ = TB is now by default defined as tanbMSSM(MSUSY)
(was tanbMSSM(scalefactor*MT) before).
tanbTHDM can be used by setting environment variable FHTBDEF = 1.
Non-default renormalization scale can be set by using environment
- μ = MUE is now by default defined as MUE(MSUSY)
(was MUE(scalefactor*MT) before).
Non-default renormalization scale can be set by using environment
- Added example scripts to run LHCHXSWG MhEFT125 and MhEFT125chi
- Bug fixed for DRbar stop input parameters (leads to shifts of O(0.1 GeV)
August 13, 2019
- Improved uncertainty estimate in the Higgs-boson mass
for more details).
The uncertainty estimate works only fully
correctly for the best available calculations!
(This implies in particular loglevel = 3, looplevel = 2.)
- Changed parametrization of non-logarithmic subtraction terms.
This leads to changes in Mh of O(0.1 GeV) (see
for more details).
- Bug fix in finite field renormalization in case of complex
input parameters; this can lead to changes in Mh1
O(1 GeV) for large phases and multi TeV scalar quark masses.
- The flag botResum = 2 is the new default.
September 20, 2018
- Implemented two-loop Δb corrections from
(thanks to Michael Spira for providing the full expressions).
This correction is activated by setting the flag botresum = 2. While
the two-loop corrections are always included in the calculation of
the Higgs decay widths, they enter the calculation of the Higgs masses only
for looplevel = 1. This restriction to looplevel = 1 is a
temporary feature that will be lifted once the
implementation of the corrections from
is completed. Thanks go to Ivan Sobolev.
- Fixed bug in the calculation of MSbar vev leading to changes
in the SM-like Higgs mass of O(0.1) GeV.
- Fixed bug for the flag runningMT = 1 leading to changes in the SM-like
Higgs mass of O(0.1) GeV.
- Fixed bug in case of DRbar sfermion input parameters leading
to changes in the SM-like Higgs mass of O(0.5) GeV for large
Ab. Thanks go to Ivan Sobolev.
May 17, 2018
- Higgs propagator poles are now (again) determined by using a numerical
pole finding procedure (as in FH2.13.0 and before), however, with a
change in the field renormalization, see the next item.
This change improves the behavior in the vicinity
of level crossing. (Thanks go to Pietro Slavich, Stefan Liebler and Tim
Stefaniak for relentless testing.). Numerically, this leads to shifts
of O(100 MeV) for most parameter choices (for low tanβ
and/or MA larger shifts are possible).
- To avoid the problems concerning the inclusion of uncontrolled
higher-order logarithms (via the iterative pole finding procedure,
see above) found in
a finite field renormalization has been introduced (in contrast to a
pure DRbar renormalization used so far).
It was ensured that the definition of ZHiggs and tanβ in our
output (which in principle could be affected by the choice of the Higgs field
renormalization) has not changed.
- Calculation of hi → γγ has been
augmented: SM limit reach in the case of strongly mixed neutral Higgs bosons
- A bug in the evaluation of mb including resummed
higher-order corrections has been removed; the numerical effect is
(very) small. Thanks go to Ivan Sobolev.
- Numerical stability in the non-degenerate
(αt2) threshold corrections in the EFT
calculation has been improved.
February 28, 2018
- Eigenvalue ordering during determination of pole masses changed
from "ascending" to "aligned with tree-level eigenstates
(h,H,A)". Should improve behavior in the vicinity of level
crossing. (Thanks go to Pietro Slavich, Stefan Liebler and Tim
Stefaniak for relentless testing.)
- In the EFT calculation for complex parameters
the O(αtαs) threshold corrections are
now interpolated correctly for complex M3.
- For DRbar stop/sbottom input:
In the hi → hj hk
calculation the stop vertex loops are now calculated with DRbar stop
- For botResum = 0 the bottom Yukawa coupling is now evaluated via
mb(mt) · (1 – Δb)
(was mb(mb) before).
- Numerical stability of
O(αt2) corrections to the Higgs-boson
self-energies in the cMSSM improved.
- The erroneous combination of MHp as input and the flag
tlCplxApprox = 0 is now explicitely forbidden.
- Bug in the one-loop H+- field renormalization
counterterm in the gaugeless limit has been fixed. This can lead to
very small changes in the Higgs-boson masses and ZHiggs.
- Message reporting fixed for Windows version of MFeynHiggs
(was broken since gfortran4.x).
- New configure option "--real10" for x86 extended precision
(between double and quad, check ./configure --help).
- configure changed: Cygwin build improved.
January 31, 2018
- In the EFT calculation the O(αt2)
threshold corrections for the non-degenerate mass case have been
implemented (taken from
- In the EFT calculation a bug in 1L electroweakino threshold correction
has been fixed; the numerical effect on Mh is smaller
than O(100 MeV).
- The fit function for σ(gg → t H+- b) has
been improved (instabilities for tanβ < 6 have been removed).
- Bug in the DRbar-OS conversion for sbottom masses used for EWPO fixed.
- In the case of DRbar input for stops and sbottoms:
The stop masses used for all calculations but the Higgs
boson masses are now again OS masses (were DRbar masses in FH2.14.0).
The output for Stop and Sbottom masses are again always OS masses.
February 11, 2017
- Two flags have been removed: fieldren and tanbren are now fixed
at their default values (0 and 0), see
Consequently, FeynHiggs is now called with 8 flags (instead of 10 before).
- (Optional) DRbar renormalization of the scalar top sector
(i.e. of mstop1,2 and Xt) has been included.
The renormalization scale is choosen to be Qt
(if loglevel != 0, Qt must be set equal to the stop mass scale).
Note: in this case the output of stop
(sbottom) parameters is DRbar (OS).
- A new option for the determination of pole masses (and ZHiggs)
has been included, avoiding the problems found in
The old version can be activated by setting the environment flag
FHFOPOLEEQ to 0.
The effect can be a downward shift of about 300 MeV in
Mh, and of about 200 MeV in δMh.
- The EFT result for loglevel > 0 is now obtained using the MSbar vev and
not the OS vev as before
(vOS2 * λ(mt) →
vMS2 * λ(mt)).
- A modified two-loop LL subtraction term for loglevel > 0 has
been introduced to better capture the logarithmic behaviour in
case of runningMT = 1,2. This can lead to an upward shift in
Mh of about 1 GeV.
- The gluino threshold now works also together with loglevel = 3.
- The mass counterterm for the A-boson changed at the two-loop
level: it now contains additionally the term
This ensures a constant A-boson mass when renormalized OS (and used
as input parameter).
For complex parameters and MH+- as input, the
two-loop mass counterterm of the charged Higgs is changed accordingly.
December 21, 2016
- looplevel = 0, 1 can now consistently be called with loglevel =
0, 2, 3 (we are working on 1).
For high SUSY mass scales, where numerical instabilities can occur
in the Feynman-diagrammatic calculation, those corrections can be
switched off at the users's will (looplevel = 0 corresponds to a pure EFT
calculation). Still experimental!
- For loglevel > 1 the one-loop and
O(αtαs) threshold corrections are now
more complete (extension to the case of non-degenerate soft
SUSY-breaking parameters, inclusion of missing term in the matching
conditions of the effective Higgs-Higgsino-EWino couplings). The numerical
effect on Mh is mostly small, O(100 MeV).
Thanks to Pietro Slavich for providing the general expression for
the O(αtαs) threshold correction.
- Interpolation of the EFT calculation in the case of complex parameters
- The flag tlCplxApprox now has only the (previously) allowed
values 0, 1, 2, 3. The choice of the parameters for the complex
interpolation, previously done by setting tlCplxApprox = 3, 4, 5, 6
is now done by calling
FHSelectIpol or by
setting the environment variable FHSELECTIPOL.
- Higgs production cross sections for WBF, ZH, WH, ttH at
13 TeV included and for 14 TeV updated.
SM cross sections are taken from the
(ttH@14 TeV still missing.)
- The electroweak precision observables have been improved and
reorganized. Thanks go to Lisa Zeune!
- The EWPO are now evaluated calling the new routine
- Δr is now evaluated in the SM and MSSM. In the SM it is
given via a Fit formula from
In the MSSM it is based on
(by L. Zeune et al.)
It contains a full one-loop calculation in the cMSSM and two-loop
corrections to Δρ interpolated for the complex
- The Δρ output now contains the one loop contribution
from the third generation of (s)quarks,
the gluon and gluino two-loop corrections (and the one
from the sbottom mass shift).
- Bug in the call of the flavor observables removed.
Several bugs for runningMT = 3 removed.
They also affected in general the scalefactor variation.
December 13, 2016
Thanks go to Pietro Slavich for relentless testing!
- Log resummation now works also for mtOS.
Therefore, the estimate of the uncertainty from higher order
corrections in the top/stop sector obtained by switching between
mtOS and mtMSbar(NNLO)
also works consistently in the case of log resummation.
The uncertainty evaluation only works reliable
for the flag choice resulting in the highest precision!
In particular, this means
mssmpart = 4, looplevel = 2, loglevel = 3,
runningMT = 1 .
- Small bug-fix in the logarithmic subtraction terms. They are now
consistently evaluated for
For loglevel > 0 this yields a small shift in Mh.
- DRbar-OS transition (for stop/sbottom sector input) improved:
The reconstruction of the DRbar mass matrix now employs
mtDRbar(Q). The DRbar-OS shifts now use
- Bug in the scale variation Q → Q/2, 2 Q in the uncertainty
calculation removed. The scale variation is not also applied in the
two-loop rMSSM corrections.
- Bug in the resummation routines for loglevel=3 fixed. It was numerically
relevant only for |XtOS/MSUSY| >
2.5. Thanks go to Peter Athron for reporting the bug.
July 01, 2016
Dec 17, 2015
- Log resummation via RGE running improved, now controlled with the
new flag loglevel.
The running top Yukawa coupling is now evaluated from the running vev.
- loglevel = 0: no log resummation
- loglevel = 1: one high SUSY mass scale (corresponds to
looplevel = 3 in previous versions)
- loglevel = 2: three high SUSY mass scales are taken into
account correctly: Mstop, Mgluino,
Mcha/neu. Electroweak contributions are taken into
account in the RGE's and in the mtMSbar
evaluation, leading to a downward shift of about 1 GeV.
- loglevel = 3: the RGE resummation is performed at the 3-loop
(NNLL) level; correspondingly the threshold effects are evaluated at
the 2-loop level.
- The RGE running now starts at mtpole,
instead from mtMSbar as before.
- Small improvements in the NNLO evalution of
mtMSbar, effect of about -60 MeV
(changing from iterated to non-iterated evaluation).
The evaluation of the Higgs mass uncertainty has changed
- αt(mt) now evaluated from the (new)
NNLO value of mtMSbar. This leads to a
downward shift in Mh of a few hundred MeV.
- Bug in the charged Higgs cross section evaluation ("alt") fixed.
For Sqrt[s] != 8 TeV the tanβ enhancement factor was missing.
- New in the default output: Xt, Xb.
June 15, 2015
- Implementation of the SM NNLO MSbar top-quark mass, to be used
instead of the NLO value, controlled by the flag runningMT. The new
options for this flag are
runningMT = 0 : top pole mass
runningMT = 1 : top SM MSbar mass at NNLO (new)
runningMT = 2 : top SM MSbar mass at NLO
runningMT = 3 : top MSSM DRbar mass at NLO
Using the NNLO top-quark mass value effectively corresponds to a
downward shift by 1.8 GeV.
This NNLO value can be used together with the log-resummation in the
top/stop sector, where it constitutes the matching value at the
top-quark mass scale.
- Bug in the Xt OS-MSbar conversion in the log resummation fixed.
Thanks go to H. Bahl.
- Production cross sections for charged Higgs bosons at 13 TeV
included, for details see
- Numerical instabilities in the O(αt2)
corrections to the Higgs boson self-energies removed.
- Updated version of the light stop benchmark scenario is provided.
- Bug in the two-loop corrections to MHp removed.
- FHGetSelf now delivers also unrenormalized self-energies and
Note: the syntax of the call has changed accordingly.
- runningMT = 2 can now be chosen for all values of tlCplxApprox.
May 15, 2015
- Implementation of a calculation of the Higgs-boson self-energies
using a DRbar top-quark mass (consistently at the one- and two-loop
level; not yet combinable with the log-resummation). This
calculation is invoked by setting the flag
runningMT = 2 ,
but so far is only implemented for
tlCplxApprox = 1 .
Details can be found in
(Thanks go to Sophia Borowka for detailed testing.)
- Bug in O(αtαs) and
O(αt2) in the cMSSM removed: M3SD = M3SU
had (incorrectly) been forced.
May 07, 2015
Apr 20, 2015
- Corrections of O(αt2) to the
Higgs-boson self-energies in the complex MSSM included, for details see
They are included automatically when tlCplxApprox != 0.
These corrections are also included into the 2-loop corrections to the
charged Higgs boson mass in the real MSSM, for detail see
For MA or MH+ the
O(αt2) corrections are now included also
with tlCplxApprox = 0.
(Thanks to Sebastian Paßehr for relentless testing!)
- Bug in FHAddSelf removed. (Thanks go to David Kunz.)
Mar 05, 2015
- Change in the calculation of Γ(H → hh): contributions
beyond one-loop from the top/stop sector have been included in the
vertex corrections (to match the corrections included in the full
calculation of Mh).
Aug 04, 2014
- In the loop-induced decays Φ → γγ, γZ, gg
as well as in σ(gg → Φ)
the bottom Yukawa couplings, containing the resummed
Δb corrections, have been improved to show full
decoupling to the SM for large SUSY mass scales.
(Thanks go to Motoi Endo.)
- Higgs decays that are not evaluated at the full one-loop level
are now calculated with the UHiggs matrix instead of the ZHiggs
matrix as before. This ensures the decoupling for the heavy neutral
Higgs bosons. More details can be found in
- The maximum length for parameter tables has been increased, in
particular to allow to read in the
May 02, 2014
- The full one-loop correction from Lepton Flavor Violation (LFV)
have been included for the Higgs-boson self-energies and the
electroweak precision observables.
They are activated by setting (at least) one of the LFV δ's to
a non-zero value, see
More information about the implementation into FeynHiggs (as well as
into FeynArts/FormCalc) can be found in
- Bug removed in the theory uncertainty evaluation for the third
Higgs-boson mass in the presence of complex parameters (thanks go to
- Bug in FHAddSelf when used within Mathematica removed (was there
- In the DRbar-OS conversion of the squark input parameter now the
SU(2) is enforced in the OS parameters (by enforcing a universal
M3SQ as obtained from the stop sector conversion).
- Fixed compilation issues for Mathematica 10.
Dec 18, 2013
- The leading momentum dependent two-loop correction at
O(αtαs) have been included, see
These new corrections make use of the program
For usage of this new feature take a look at the README.
June 06, 2013
- The evaluation of Higgs boson masses (in particular
Mh), mixing angles and field renormalization constants
has been improved for large scalar top masses (in the
multi-TeV range). A resummation to all orders of leading and
subleading logarithms of the type
log(mstop/mt) has been included, see
for details. The new calculation is activated by setting the flag
looplevel = 3.
for very large values of
mstop above 10 TeV and negligible mixing in the stop sector
quadruple precision might be needed to get a reliable result.
- LHC Cross section for pp → H- t* + X at 8 TeV
included. So far it is only available (roughly) for tanβ > 30.
(Thanks go to Martin Flechl.)
To get the cross section for H- and
H+ production, a factor of 2 has to be applied.
For this cross section,
- Bug for complex parameters in interpolated(!) two-loop
corrections removed. Was in there since FH286.
- Decays of H/A to scalar neutrinos included.
- The output for the sbottom-like squark masses now contains the
Δb corrections in the off-diagonal
entry. Internally nothing has changed in the calculations.
- MathLink compilation fixed for MacOS10.9.
Sep 27, 2012
- The decay mode Higgs → Z γ is finally included (SM and MSSM).
- Conversion of Ab from DRbar to OS has been corrected
to match exactly the implemented two-loop corrections. This is
implemented so far at O(αs), where the remaining
terms should be marginal. (Thanks go to P. Slavich!)
- Removed overcounting of running mt in the
Δb entering the two-loop Higgs self-energy
calculation. (Thanks go to P. Slavich.)
- In the presence of NMFV effects, a separate set of MFV sfermion
masses and mixings (with off-diagonal elements neglected) is now used in
the MFV-only parts of FeynHiggs, e.g. all two-loop corrections,
rather than the corresponding entries of the full NMFV matrices.
This guarantees unitarity and is furthermore unaffected by level
crossings, which could distort MFV-only results considerably.
Note that the syntax of the FHGetPara API call has changed since it
now returns both sets of sfermion masses and mixings.
- The gluonic two-loop contribution to Δρ is now
evaluated over all sfermion generations.
- Bug fixed in the 2-loop (g-2)μ calculation.
- The new benchmark scenarios as given in
are now included as default scenarios. In example/LHBMS/ the
scenarios can be found in complete agreement with the publication
can be found. In example/LHCHXSWG/ the scenarios as used by the
Higgs Cross Section Working Group can be found (including a
script to create the corresponding SLHA files).
- Bug removed that caused faulty calculations for runningMT = 1
and looplevel = 1 (thanks go to Oscar Stal and Leo Galeta).
Bug was present in FH2.9.[0-3].
- Calculation of MW improved: now the Higgs mass with
the largest coupling to WW is used for the SM evaluation.
Sep 17, 2012
- Bug in the MathLink fixed (was present only in FH292).
- Redefinition: Key → FHKey in CFeynHiggs.h and MFeynHiggs
to be compliant with ROOT.
- Better SLHA1 compliance in SLHA output (relevant when FH is the
first step in an SLHA chain).
Jul 27, 2012
- Bug in the 7 TeV cross section removed. In intermediate versions
the result was given in 1/pb, not in 1/fb.
- Man pages updated.
- Minor fixes for the C/C++ interface.
July 02, 2012
- Bug removed that resulted in a small shift in the charged Higgs
mass when it was chosen as input value and p2approx = 4 was used.
- Quad-precision now also works for MFeynHiggs.
- Enlarged SLHA(1) output in case FeynHiggs is used as the first
step in an SLHA chain; results in improved readability of subsequent
- Significantly restructured C/C++ interface (CFeynHiggs.h).
Works with C99 and interfaces to the quadruple-precision version
using the long double type in C (for details see
June 19, 2012
- Improved hi → γ γ decay rates which show the
correct decoupling behavior. (Largest effect came from the
different treatment of the charged Goldstone boson loop in the SM
and MSSM.) Thanks go to Oscar Stal for
8 TeV cross sections added for VBF, WH, ZH, ttH.
14 TeV cross sections for those channels update from
SM cross sections are taken from the
LHC Higgs cross section working group.
MSSM correction factors are applies as for 14 TeV.
- Potential problem in the DRbar-OS transition fixed.
The problem occurred for large (μ tanβ). In this case the
correction to Ab could become very large, unreliable and
jeopardizing the whole evaluation of Higgs masses etc. Now in case the
correction turns out to be larger than 30% the DRbar-OS transition
for the scalar bottom sector is switched off.
Consequently, also the involved two-loop corrections to the Higgs
are switched off.
- Bug in the evaluation of mt(Q) removed. If runningMT = 0
was chosen, the running started (wrongly) at mtpole,
and not at mt(mt). For runningMT = 1 no error
- The choice of the flag runningMT now only affects the top mass
used in the Higgs boson self-energy correction, but not enter
anymore in, for instance, the Higgs decay evaluations.
Similarly, the flag botResum only affects the bottom/sbottom
contribution in the Higgs boson self-energies (however, in other
calculations where appropriate Δb is used as
before, just the flag has no impact anymore).
More specifically: The flags affect mainly the Higgs boson mass
evaluation, but not the subsequent evaluation of decay widths, cross
This can lead to smaller changes in some observables for some
specific choice of flags.
These changes apply similarly to all three generations of squarks.
The sbottom mass output (also via FHGetPara) now
corresponds to mb(mb) (without any
A summary of the various calculations of
Yukawa couplings, squark masses etc. can be found
- New output call for sbottom sector parameters that are used in
Higgs boson self-energy corrections:
(see the man page).
- Now all sfermion masses are part of the screen output.
- Bug in the Δρ (and thus in the MW and
sin2θeff) removed (was in since FH28?).
This bug was effective only for very large sfermion masses.
Thanks go to Pietro Slavich.
- Charged Higgs decays are now evaluated for VCKM =! 1.
The Δb-type corrections to the bottom-type Yukawa
couplings are now also included in generation mixing decays, e.g. in
Γ(H+- → bc).
The HpSfSf macros have an additional generation index now.
- In the case of MFV the LL-entries in the stop-type mass matrices
agree now exactly with the sbottom-type matrices, i.e. the rotation
with VCKM that is required in the case of NMFV
is not executed in the MFV case.
- Bug fixed in the NMFV calculation of Higgs boson self-energies.
Thanks go to Arnd Behring and Stefan Schacht.
- Name conventions for the NMFV parameters changed slightly.
Also LFV parameters processed (but not yet actively used
in any FeynHiggs computation).
- Default value for p2approx was changed from 0 to 4, i.e. now
by default UHiggs is evaluated at p2 = 0, see
- The configure option --quad now also works with gfortran
(possible since gfortran 4.6).
- Minor fixes in the SLHA reader (possible sign reading error in
- Still some problems with quad precision in MFeynHiggs persist;
will be solved for FH291.
December 22, 2011
- Reparametrization of running top mass in the two-loop terms
improved. The difference between the two options runningMT = 0, 1 is
of pure three-loop order. Small effects on masses and uncertainties
for runningMT = 1.
- Decay H -> VV* refitted for MH < 161 GeV, minor changes.
- Problem in the SLHA reader fixed (was present only in FH2.8.5)
that led to problems for complex parameters.
August 2, 2011
- Fixed problems in configure with SLC.
- Fixed inconsistent scale of alpha_s in MSbar → DRbar conversion
(Thanks to Pietro Slavich).
- Fixed problem in SVD for all-zero diagonal.
- Fixed naming of H+ → f f' decays in the textual output.
July 26, 2011
June 10, 2011
- Γ(hi → hj hk) now
included with the full one-loop corrections, for details see
- Γ(hi → ff) improved to match exactly
- Charged Higgs decays are now evaluated for CKM <> 1. New decays
are H- → cb etc.
Also Δs,d are now included here for the decays
within one generation (so far only Δb was used).
- The decays hi → WW, ZZ are now evaluated with the
SM results taken from
(at the NLO level; thanks go to Ansgar Denner, Ivica Puljak and
Daniela Rebuzzi). The MSSM results are obtained, as before, by
applying the effective coupling approximation.
- Bug in the O(mt4) correction to
- Bug in the DRbar-OS conversion fixed: the stop/sbottom conversion
routine was before accidentally also excecuted for staus.
June 08, 2011
- Bug in charged Higgs cross section removed. So far the cross
section was evaluated for MA, not for
- Several Higgs cross sections got re-fitted, leading to
differences below 1%.
- Problem with Higgs productions at very high Higgs boson masses
removed (which could lead to a floating exception).
- All hard links were replaced by soft links to improve AFS compatibility.
June 02, 2011
- Bug in Γ(H+ → tb) removed that was active
for MH+ < mt (an error in the
interpolation; thanks go to Phillip Gutierrez).
- ``make all'' is no longer necessary. configure determines whether
MathLink executables can be created. This is then done automatically
- Improved compilation with ifort.
May 12, 2011
Oct. 19, 2010
- Changes in Γ(hi → ff):
- After the introduction of the full one-loop corrections to all
Γ(hi → ff) for extreme parameters it was
possible that large negative one-loop corrections could drive the
respective Γ < 0. This is now avoided by adding always
the full loop-squared term.
Of course, this problem occured only in extreme scenarios with a
very small tree-level contribution.
- In Γ(hi → ff) now also self-energy type
diagrams on the externa Higgs boson leg
with a Higgs mixing with a Z boson or the Goldstone boson G are
- In case of Γ(hi → bb) the interference term
at the one-loop level now also includes the Δb
- The implementation of Γ(hi → ff) now
- Bug in the φ-b-b effective coupling has been removed.
- The Higgs boson mass limits in FHHiggsProd for which cross
sections are evaluated are now inclusive for the limit values,
not exclusive as before. Obviously this only has an effect if
exactly the limit value was reached with one Higgs boson mass.
- A new function was implemented:
it gives back all derived NMFV parameters, i.e. ...
- The internal structure of the NMFV parameters has changed. This
should have no visible effect for the user.
- A bug in the table function removed.
- Removed division-by-zero condition when setting CKM parameters to zero.
- Mathematica output now also contains the console output,
e.g. references to other codes used within FeynHiggs.
Sep. 28, 2010
- Bugfix in the effective bb-Higgs coupling (only in the effective
coupling, not in any production or decay mode).
- Finer grid for σ(gg → hi) calculation
(thanks go to A. Vicini).
Aug. 27, 2010
- Bug fixed in the Γ(t → H+b) calculation.
Before the Δb contributions were included twice.
Bug was present only in FH2.7.[0,1,2].
- SU(2) compliance of NMFV improved.
Aug. 4, 2010
- Bug fixed in the complex two-loop Higgs boson self-energy corrections.
Changes occur only for the Higgs mass uncertainty calculation.
- Bug in the SLHA reader fixed. A-terms of first and second
generation were read in wrongly.
Jul. 30. 2010
- Two bug-fixes in FHAddSelf and DRbartoOS.
Jun 11. 2010
- New "amplitude corrections factors" for gg →φ (φ = h,H,A)
to match better the SM calculation. Thanks go to A. Vicini
- New subroutine
FHAddSelf allows the user to include/add (momentum independent!)
shifts in the Higgs-boson
self-energies, to be used consistently in the computation of
the Higgs masses and mixings.
It has to be called after all SM and MSSM parameters are set.
A flag controls whether the contributions to the CP-even
self-energies are given before (φ1-φ2 basis)
or after (h-H basis) the rotation with α.
Take a look at the corresponding
- Bug fixed in Γ(t → H+ b).
This bug was present only in FH270.
- Bug fixed in Γ(H+ → t b).
This bug was present only in FH270.
Apr 23. 2010
- The LHC Higgs production cross section σ(gg → h) has
- In the bottom Yukawa coupling we use
mb(mb). This can lead to a strong
increase in the cross section for large tanβ.
- The renormalization cross section for the SM is now calculated
only up to NLO. This ensures that the NNLO corrections are only
applied to the top loops.
- The SM prediction is now taken from
et al., see that web page for an extensive list of references.
- Bug in the calculation of ttH/A has been fixed. Changes in tth
should be minor.
- Bug in the calculation of MH+ in for the choice
mssmpart = 1 has been fixed (thanks go to Tomas Gonzalo).
- The full one-loop contributions to
Γ(Φ → f1f2) have been
included. This includes also flavor-violating decays
(f1 ≠ f2).
Thanks go to Karina Williams for checking and providing results.
Thanks go to Dominik Scherer for providing data on Δb.
Call to FHCouplings slightly modified. The "excl" option has been
The new last argument "fast" specifies
whether the off-diagonal Higgs to fermion decays are evaluated.
fast = 0 : all Higgs to fermion decays are evaluated
fast = 1 : only the diagonal Higgs to fermion decays are evaluated.
- The LHC Higgs production cross sections (FHHiggsProcs) is now
envoked with the collider energy as an argument. Some production
cross sections are now available for various center of mass
The SM bb-Higgs production is taken from
by R. Harlander and B. Killgore using the respective code
More details can be found in the man page of
- Phase interpolation in the two-loop contributions improved.
Now the flag tlCplxApprox can take the values from 0 to 6:
#9 = tlCplxApprox, complex parameters in the 2-loop corrections
0: all corrections evaluated in the rMSSM
1: a_s a_t in cMSSM only
2: a_s a_t in cMSSM, rest in rMSSM
3: a_s a_t in cMSSM, rest interpolated in At,Ab,M_3,MUE (default)
4: a_s a_t in cMSSM, rest interpolated in At,Xb,M_3,MUE
5: a_s a_t in cMSSM, rest interpolated in Xt,Ab,M_3,MUE
6: a_s a_t in cMSSM, rest interpolated in Xt,Xb,M_3,MUE
If phase interpolation is wanted, the user has to specify what
his input variables are. The interpolation is then performed in
exactly these variables.
- the flag runningMT now only has two options:
#7 = runningMT: determines which top mass shall be used in the corrections:
0: MTpole directly and in the stop masses
1: MTrun directly and in the stop masses
More information can be found in the change-log from Dec. 20. 2008.
- Calculation of uncertainties related to Δb
improved. Now the uncertainties are evaluated as the difference in
the Higgs masses for Δb in the denominator
(resummed) and in the numerator (not resummed).
- External Z-factor for charged Higgs included to ensure the
on-shell properties for an external charged Higgs.
- Call to set the NMFV parameters has changed:
& deltaLL12_, deltaLL23_, deltaLL13_,
& deltaLRuc_, deltaLRct_, deltaLRut_,
& deltaRLuc_, deltaRLct_, deltaRLut_,
& deltaRRuc_, deltaRRct_, deltaRRut_,
& deltaLRds_, deltaLRsb_, deltaLRdb_,
& deltaRLds_, deltaRLsb_, deltaRLdb_,
& deltaRRds_, deltaRRsb_, deltaRRdb_)
It is now taken into account automatically that the LL entries have
to be equal for top- and bottom-type squarks (modulo CKM rotation
that is also taken into account).
- Bug in the calculation of MH+ in the NMFV case fixed.
- Bug in the settings of Sbottom masses in the complex 2L
corrections of O(αtαs) fixed.
This bug could lead to a large error for Mgluino >>
- Calculation of ΔMs inclucded (also for NMFV,
added in collaboration with J. Illana).
- Γ(H+ → tb) has been fixed for
MH+ < MW + 2 mb.
Now it is (correctly) set to zero. Thanks go to Pietro Slavich.
- Error in the NMFV input parameters corrected. Before no NMFV
parameters were recognized. This problem appeared only in FH265.
- FeynHiggs can read input from stdin, use "-" as file name.
Dec 20. 2008
- Use of running top mass changed, flag tl_runningMT changed to
runningMT. Now the same top mass is used in the one- and two-loop
corrections (and in the evaluation of the scalar top masses).
- runningMT = 0: the pole mass is used everywhere.
- runningMT = 1: the running mass is used everywhere, except in
the stop mass matrix for the evaluation of the stop masses and
mixing angle. The same stop masses and mixing angle are used for
one- and two-loop corrections.
- runningMT = 2: the running mass is used only for the evaluation of
the stop masses and mixing angle.
- runningMT = 3: the running mass is used everywhere (default).
The running mass is defined as the SM MSbar mass at the scale of the
top mass. The corrections included into the SM MSbar top mass are
consistent with the choice of the two-loop corrections. If only
O(αtαs) corrections are included
at the two-loop level, only the O(αs) term is
included in the SM MSbar top mass. If in addidtion also the
O(αt2) corrections are included
at the two-loop level, also the O(αt) term is
included in the SM MSbar top mass.
This means especially that using only the one-loop corrections (flag
looplevel = 1) the flag runningMT has no effect.
The theory uncertainties derived from the change in the top mass are
evaluated as the difference of runningMT = 0 and 1 (2 and 3) if
runningMT = 0 or 1 (2 or 3) has been chosen by the user.
- Scale of αs entering the Δb
corrections changed from Qold = mt to
Qnew = Sqrt[msbot1 msbot2].
However, the induced change should be considered as an additional
- The Δb corrections in the one-loop result for
the Higgs boson self-energies are now only included if the
respective extra two-loop self-energies
O(αbαs) are included. Otherwise
the running bottom mass, mb(mb) is used for
the one-loop self-energies. Thanks go to Karina Williams.
- DRbar-OS transition for mb corrected. In FH264/263 the
implementation lead to uncertainties in the interpolation routines
in the sub-leading two-loop corrections in the presence of complex
- Bug in the DRbar-OS transition for scalar tops and bottoms
removed. The bug was effective when the complex
O(αt αs) routines were used.
- new k-factors for gg → Φ implemented. Thanks go to
- Application of SUSY corrections (via Δb) to the
charged Higgs production cross section improved. Now they are only
applied to the bottom Yukawa coupling.
- Interpolation for Γ(H+ → tb) corrected.
Thanks go to Marina Billoni.
- Bug in the initilization of the CKM matrix removed.
Thanks go to Diego Guadagnoli.
- A warning is printed if the (g-2)μ is unreliable
due to a numerical instability. This can happen if two masses
involved become degenerate.
- Including "FHRecord" simplified/improved.
July 04. 2008
- Bug in the NMFV evaluations (Higgs sector and BR(b → s γ))
removed (was only in version FH2.6.3).
- Bug in h → gg removed.
May 13. 2008
Nov. 12. 2007
- Improved calculation of gg → φ, φ = h, H, A:
more precise inclusion of interference of bottom loops with other
contributions at large tanβ.
Thanks go to Michael Spira.
- Augmented the Higgs-mass determination algorithm by a fully
complex treatment of p2.
This could lead to (normally very) small differences in the Higgs
Correspondingly improved treatment of ZHiggs. Parameter points with
extreme mixing of H and A are more stable now.
- The running b quark mass is now the DRbar mass (was the MSbar
mass before). The shift in the mass should be below 5%.
- Improved calculation for BR(b → s γ):
Resummation effects for large tanβ included.
- Interpolation of decay widths going from off- to on-shell decays.
- The parameters defining the CKM matrix are now the Wolfenstein parameters.
- Extended debug output (for FHDEBUG = 2).
- Some problems with the DRbar-to-OS transition for complex
- Configure adapted to g95 and gfortran.
- Bug in the call for NMFV parameters removed (was effective only
from FH260 on).
Bottom quark mass in H → gg, γγ in the SM improved.
Bug in the call to the SLHA routines fixed (appeared only in FH2.6.1
due to the change in the SM parameter handling).
Oct. 08. 2007
July 23. 2007
- The invocation of the SM parameter settings has been simplified:
A new, optional, call to set the SM parameters has been
All SM parameters, except mt, but including the CKM
parameters, are defined by this call.
If this call is not made, default values are used, see the
corresponding man page.
The call to
has been shortened accordingly.
The routine FHSetCKM does not exist anymore.
- Four new functions to retrieve data have been included:
The new functions allow to retrieve "input data" from FeynHiggs.
This is useful if the parameters are set via SLHA or benchmark planes.
- The definition of the Z-matrix has been changed slightly
eq. (88) and before):
Now a complex mass square is used as momentum; the Re[..] in the
defintion of the diagonal entries has been dropped.
Thanks go to Federico von der Pahlen and Karina Williams.
- The bottom quark mass input is now defined as
mb(mb), default 4.20 GeV.
The charm quark mass input is defined as
The strange quark mass input is defined as
ms(2 GeV), default is 0.095 GeV.
- Running mb(Q) (and other quark masses): bug removed,
effects visible for Q > mt.
This also affects the Higgs
production cross section bb → φ, φ = H, A with
MH,A > mt.
Thanks go to Robert Harlander, Wolfgang Mader, Michael Spira
and Markus Warsinsky.
- αs(Q): improved running for Higgs decays. Now we
use everywhere the official PDG formula, see
- For the O(αtαs) corrections
in the cMSSM: numerical instability removed for At → 0.
Another numerical instability removed for Xt → 0.
- BR(t → H± b): bug removed.
- The gluino mass, MGl, is now also an output in
January 09. 2007
- The two-loop O(αtαs) corrections
entering the Higgs-boson masses and mixings
are now evaluated with the full complex phase dependence, see
- For the evaluation of the two-loop corrections in the precsence
of complex phases a new 9th flag
is introduced, see the FHSetFlags man pages. The options are:
0: all corrections (asat, asab, atat, atab) are computed in the
1: only the cMSSM asat corrections are used
2: the cMSSM asat corrections are combined with the remaining
corrections in the rMSSM
3: the cMSSM asat corrections are combined with the remaining
corrections, interpolated in the complex phases
The new default is 3.
- Self-defined parameter planes can be processed. The data is
available in a two-dimensional grid format. An interpolation is used
to obtain parameter values for any input. See the new man pages
for the FHRecord (last line of man pages above).
- Predefined NUHM benchmark planes (in agreement with Cold Dark
Matter measurements) are available, see
The planes are available here.
- The production cross section gb → tH- at the LHC is
included. The cross section without Delta_b corrections
are taken from
(by T. Plehn) and
(by E. Berger, T. Han, J. Jiang and T. Plehn).
The cross sections are supplemented with the Delta_b
- The BR(t → H+ b) is evaluated (and can be used for
the production cross section for low charged Higgs boson masses).
- The BR(H+ → t*b) is evaluated for
off-shell top quarks.
- A bug in the computation of mb(Q) for Q >
mt has been removed (thanks go to Karina Williams).
This can lead to a noticible change in Gamma(H,A → bb) for
MH,A > mt. The cross section evaluation with
the radiation off bottom quarks, however, was ok.
- FeynHiggs now compiles under Windows (Cygwin), including the
MathLink executable MFeynHiggs.
- FHGetPara now also includes the gluino mass (necessary e.g. if
the new parameter planes are used).
configure adapted to new compiler versions.
December 21. 2006
- Inclusion of two new values for p2approx.
p2approx = 4 is appropriate for large values of the heavy Higgs boson
masses to ensure decoupling of effective couplings.
Linking of FeynHiggs to C++ codes improved; example file (demo.cc) included.
Routine for root finding improved to prevent infinite loops.
configure improved (out-of-source-tree build possible).
Bug in the FHUCC removed that prevented setting of M1.
December 14. 2006
Possible problem with Delta_b resummation removed. We strongly recommend
to use the updated version.
November 27. 2006
The imaginary parts in the Higgs boson self-energies (at the one-loop)
level are consistently taken into account for the evaluation of the masses
and the Z-factors. Details can be found in
The Z-factors are used to evaluate all Higgs decays and production
cross sections (this was missing in a very few cases so far).
The U-Matrix is now (again) evaluated from the 3x3 mass matrix evaluated
at p2=m2tree. By construction this matrix
The Higgs production cross section in association with bottom quarks extended
to Higgs masses up to 1 TeV.
The Higgs production cross section in association with the light stop
has been included. The kinematics have been provided by Sherpa (thanks go
to Frank Krauss).
Formula for the EDM of the neutron improved.
demo.m updated to match FeynHiggs2.5.
Configuration extended and compilation tested for Mac OS X
under g77 and xlf.
June 30. 2006
A few small Fortran bugs removed
June 22. 2006
Problem with diagonalization in the complex case solved (by implementing
a completely new diagonalization routine).
The Higgs masses are evaluated with two independent methods to detect
potential numerical problems and possible instabilities. This can be
especially relevant if masses are close to each other in the complex case.
Decays of the neutral Higgs bosons are evaluated with the appropriate
finite Z-factors (ZHiggs), see
hep-ph/0003022 for the
real case and
for the complex case.
The mixing matrix (UHiggs) is used to evaluate the effective couplings
that can be used for the rotation of internally appearing Higgs bosons.
Bug in DRbar to on-shell transition fixed. Now also the proper mb
value is used, rendering the transition more stable.
demo.F updated to match FeynHiggs2.4.
May 12. 2006
Several improvements and new features
have been implemented:
- The calls to
FHSetPara, FHHiggsCorr, FHConstraints
have been modified slightly, see the man pages for details.
You have to adjust these calls.
- Neutral Higgs boson decay are now evaluated with the full rotation
to on-shell Higgs bosons, i.e. beyond the effective coupling
approximation. The information is given as the new output matrix
(For the rotation of internal Higgs bosons the matrix UHiggs
is provided as before.)
- The charged Higgs decay to light quarks is evaluated using running
- The one-loop corrections to Higgs masses and mixing angles are now
evaluated with the full 6x6 NMFV
contributions (including off-diagonal mass terms and A terms).
Corresponding new man pages are provided.
- The CKM matrix corrections are included.
Corresponding new man pages are provided.
- The corresponding information can be passed with the new version
of the SUSY Les Houches Accord 2, see also
(by T. Hahn).
- The BR(b → s gamma) is evaluated,
including NMFV effects, , see
(by T. Hahn, W. Hollik, J. Illana, S. Penaranda) for details.
- As additional constraints MW
are evaluated, including NMFV effects (full SM + Delta rho SUSY
Note: Works correctly so far only for MA > 150 GeV.
May 02. 2006
Unitarity quality of UHiggs improved.
Mar 03. 2006
Several improvements have been implemented:
- FHCouplings is now fully addapted to handle complex parameters.
Especially ttHiggs production cross sections are improved
(thanks go to Federico v. d. Pahlen)
- slight (preliminary) change in the inclusion of the complex phases
into the two-loop contribution. (Next update will include
the full complex phase dependence for the strong two-loop corrections.)
- Phase conventions for UHiggs are chosen such that the results give
a smooth limit to the real case (nothing wrong before, just a matter
- on-shell mass (either MA or MH+-) remains
unchanged as it should (problem occured only for certain approximation
Jan 31. 2006
Several improvements have been implemented:
- The complex contributions to the Higgs boson self-energies at the
one-loop level are taken into account. The Higgs boson pole masses
are derived as the real parts of the complex poles of the complex
- Correspondingly, the mixing matrix is now also complex. This is also
taken into account in the Higgs boson couplings and decay widths.
- Negative entries are allowed for the squares of the soft SUSY-breaking
parameters (for the diagonal entries for the sfermion mass matrices).
The input is given as a negative mass, -m, that is then internally
converted to -(m**2).
- slight (preliminary) change in the inclusion of the complex phases
into the two-loop contribution.
- The 2-loop corrections to (g-2)mu has been extended.
All contributions described in
(by S. Heinemeyer, D. Stöckinger, G. Weiglein) are now
included by choosing the configure option --enable-full-g-2.
If this option is not chosen only the leading two-loop are included.
- If the full version of (g-2)mu
is chosen, full precision is only guaranteed
if quadruple precision is enabled (for the Intel Fortran compiler
this is done with the configure option --quad.)
The code might become slower...
- The call to FHCouplings
has been modified slightly. It is extended
by one variable (..., excl). See the man pages for details.
If you call FHCouplings from your code
you have to adjust this call.
- A bug in the coupling of the A to SM fermions and neutralinos
has been corrected (thanks go to Federico von der Pahlen).
- Several small Fortran bugs have been removed.
June 22. 2005
Higgs production cross sections at Tevatron and LHC evaluated in the
effective coupling approximation. SM cross sections taken from
(Fabio Maltoni, Scott Willenbrock).
Bug removed in the evaluation of A-stau-stau and A-sbottom-sbottom
(thanks go to Uli Martyn).
Result output on the screen is automatically piped to less.
May 30. 2005
Flags are now optional. Default values are 40020211 (corresponding
to the best evaluation in the real MSSM). If you want any flag differently,
you have to give all the flags.
Bug in SLHA mode (output of SUSY masses) removed, PDG codes aligned.
Apr. 25. 2005
Delta mb is now complex also in the output (so far only
internally a complex Delta mb was used).
This results in a slightly different structure of FHGetPara. If you are
using FHGetPara, you have to update your call.
The evaluated uncertainties are now also written out with the SUSY
Les Houches Accord. The names of the new blocks are DMASS and DALPHA.
The Kallen function has been made stable against weird cases (thanks
go to Bjarte Mohn).
Slight inconsistency in BR evaluation for decays to neutralinos removed
(Calculation of decay widths was ok).
Mar. 11. 2005
SLHA readout improved.
Environment variable FHDEBUG introduced for easier debugging.
More detailed error messages (due to unphyiscal parameters) in the
two-loop part included.
Mar. 03. 2005
This is the FeynHiggs version for the CMS PTDR.
For more information go here.
The debug level can be changed now without recompiling. Corresponding
man pages are provided.
Fortran bug in the decay H+ → top bottom removed.
Feb. 28. 2005
Definition of Delta mb for Higgs decays has been changed
back as in FeynHiggs2.1.
Intermediate versions might show inconsistencies for Higgs decays to
More options for configure, especially concerning the SLHA output
(try ./configure --help).
The structure of FHGetPara has changed! If you use this function, your
call has to be modified to match the new version.
Feb. 08. 2005
A Fortran bug in SLHA implementation removed.
Jan. 26. 2005
A Fortran bug in FHCouplings removed.
Call for FHConstraints changed, including a new experimental feature.
Use at your own risk! This feature will be updated soon.
Jan. 13. 2005
Man pages for FHConstraints and FHUncertainties included.
Mathematica Front-end updated.
Dec. 22. 2004
The theory error of the Higgs masses and mixing angles
due to unknown higher-order corrections are evaluated
(this feature has not been tested thoroughly yet).
The error evaluation follows the description in
including also three-loop uncertainties from the scalar top and bottom
Dec. 20. 2004
The syntax of FHCouplings has changed.
All SM Higgs couplings are evaluated.
Online results are availabe via FHUCC.
Nov. 24. 2004
The code has been rewritten to a large extend to optimize speed
and accuracy. This includes modified calls for the evaluation of the
The remaining O(αs αb) corrections
have been included (thanks go to Pietro Slavich),
which can yield non-negligible contributions for
large (-mu) and tan beta. The corrections are taken from
(A. Bringnole, G. Degrassi, P. Slavich, F. Zwirner)
The remaining O(αt αb) and
have been included (thanks go to Pietro Slavich),
which can yield non-negligible contributions for
large (-mu) and tan beta. The corrections are taken from
(A. Dedes, G. Degrassi, P. Slavich)
A new routine for the SLHA has been implemented, see
(by T. Hahn)
Apr. 07. 2004 (FeynHiggs2.1):
The two-loop routines have been improved to behave more stable in
extreme scenarios in the cMSSM.
The integration routines for off-shell decays avoid possibly infinite
loops that could have occured before in extreme parameter points.
Feb. 24. 2004 (FeynHiggs2.1beta):
FeynHiggs should compile better now also with all versions of g77.
The man pages (especially concerning the flags) have
been made more clear. Preferred choices are indicated
(thanks go to James Haestier).
Feb. 13. 2004 (FeynHiggs2.1beta):
The evaluation of (g-2)mu at the two-loop level has
been added, see
(by S. Heinemeyer, D. Stöckinger, G. Weiglein) for details.
The default version contains only the leading corrections at the
two-loop level. To install all corrections the additional package
gm2.uu is needed.
Put it in your FeynHiggs home directory, unpack it with
and follow the instructions in the README.
FeynHiggs now also runs independently of LoopTools again.
The decay widths Gamma(h → gamma gamma) and Gammma(h → gg)
are evaluated to zero if LoopTools is not installed.
The man pages (especially concerning setmudim) have
been made more clear (thanks go to Gudrun Hiller).
Nov. 24. 2003 (FeynHiggs2.1beta):
The charged Higgs decays are now also included (but not thoroughly tested
yet). Give it a try :-)
The man pages (libFH.1) have been updated. The information about ffini
was missing so far (thanks go to Markus Schumacher).
Nov. 16. 2003 (FeynHiggs2.1beta):
A bug in the evaluation of Higgs → cc has been fixed (thanks go to
Nov. 14. 2003 (FeynHiggs2.1beta):
Implementation of all neutral Higgs boson decay channels, additional
Higgs gauge boson and Higgs self couplings. The production cross
section of a Higgs boson at a gamma gamma Collider is also evaluated.
A new flag has been introduced that allows to switch between
on-shell and DRbar values of the stop/sbottom sector parameters.
benchmark scenarios and the Les Houches benchmark scenarios for
the Higgs boson search at hadron colliders (see
(M. Carena, S. Heinemeyer, C. Wagner, G. Weiglein)) are given as
Processing of Les Houches
Accord data is possible.
Apr. 28. 2003 (FeynHiggs2.0.2):
A bug in the frontend has been removed. The bug resulted in a mix-up
between the different triliner couplings At, Ab, Atau. (The call within
Mathematica, however, was ok.)
Apr. 24. 2003 (FeynHiggs2.0.1):
Definiton of Delta mb has been changed. Now the complex one is used
for masses and couplings. The new Delta mb also contains by default
(besides the strong) the electroweak contribution.
Apr. 14. 2003 (FeynHiggs2.0):
A bug in configure has been removed, now ABTools is linked properly.
Mar. 31. 2003 (FeynHiggs2.0):
FeynHiggs2.0 is available.
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