About Me

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Taushif Ahmed

I am a post-doctoral scientist at Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) in Munich, Germany. Prior to this, I was a post-doctoral scientist at the Institute of Theoretical Particle Physics (TTP) in Karlsruher Institut für Technologie (KIT), Karlsruhe. It was a joint position between KIT and Johannes Gutenberg-Universität Mainz, Germany. Before that, I was an integrated - Ph.D. student in the Dept. of Theoretical Particle Physics at Harish-Chandra Research Institute (HRI) situated at the bank of rivers Ganges and Yamuna in Allahabad, India. Later, on March of 2015 I moved to The Institute of Mathematical Sciences (IMSc), Chennai, India. The whole tenure of my Ph.D. is partially spent in HRI and the rest in IMSc.

I have time dependent hobbies! I love to explore various programming languages, such as BASH shell script, HTML! I love to keep myself updated with the latest technological gadgets! I love to visit tourist spots provided my physical strength does not betray! Occasionally, I love to play a role of an unprofessional and unsmart photographer with my age-old companion D3100! I love to listen to western music! I love to listen to Rabindra sangeet! I love to teach Physics and Mathematics.

Education


Postdoctoral Scientist Oct 2018 - Present

Postdoc in Theoretical Particle Physics
Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany

Postdoctoral Scientist 2016 - 2018

Postdoc in Theoretical Particle Physics
Karlsruher Institut für Technologie(KIT), Karlsruhe, Germany (Oct 2016-Sep 2017).
Johannes Gutenberg-Universität Mainz, Mainz, Germany (Oct 2017- Sep 2018).

Ph.D. 2013 - 2016

Ph.D. in Theoretical Particle Physics
The Institute of Mathematical Sciences, Chennai, India (March 2015-Sept 2016).
Harish-Chandra Research Institute, Allahabad, India (Aug 2013-March 2015).
Thesis Supervisor: Prof. V. Ravindran

M.Sc. 2010 - 2013

M.Sc. in Theoretical Physics
Harish-Chandra Research Institute, Allahabad, India.

B.Sc. 2007 - 2010

B.Sc. with Honours in Physics
St. Xavier's College, Kolkata, India.

Research

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Have you wondered ever, what happens if you start breaking an inanimate object whatever you see around you!? Does it excite you if I say whatever you ‘see’ around you through your naked eye, all are made up of only 17 different types of particles!? Does it stir your young mind, if you are told there are only 4 kinds of forces responsible for all the phenomena taken place in the universe [definitely except love ;) ]!? These types of extraordinarily fascinating things are being investigated over past few centuries! Thousands of genius minds’ hard work have led us to these enthralling conclusions! My area of research, in a broader sense, does belong to the above mentioned categories. I am trying to understand the nature of some of the fundamental particles (quark, gluons, Higgs bosons etc.) among the above-mentioned 17. How do they behave? How do they help to build up the universe? And also...are these the only fundamental particles existing in the universe or there are many more? There are hundreds of unanswered questions which are part of active investigations in the scientific community of particle physics. Being a theoretical physicist, I try to explore and understand these through mathematics. The outcomes of the theoretical understanding require experimental verifications before reaching out to a conclusion.

After the discovery of the Standard-model-like scalar Higgs boson at the LHC, the high energy physics community is standing on the verge of a critical era where any deviation from the predictions of the Standard model (SM) will lead us beyond the wall of known physics. For the past few decades, the SM has been sitting on the golden throne of high energy physics with great pride. However, it fails to describe many intersting facts, such as, baryon asymmetry in the universe, non-zero mass of the neutrino, dark matter, dark energy. So, a new theory beyond the SM is required to get satisfactory answers involving these. This investigation of the new physics beyond the SM demands precise theoretical predictions in addition to the remarkable experimental progress.

My main interest lies in the precise theoretical predictions of the observables associated with the SM as well as BSM scenarios.

Research Interests



  • Perturbative QCD (pQCD)


  • Multiloop and Multileg Computations in pQCD


  • Collider Physics Phenomenology


  • Scalar and Pseudo-scalar Higgs Boson, Drell-Yan, Spin-2 Particles


  • Soft Gluon Resummation


  • Renormalisation Group Improved Resummation


  • Infrared Structure of QCD Amplitudes


  • N = 4 Super Yang-Mills Theory


  • Helicity Method of Computing Scattering Amplitude


Operating Systems



  • Linux


  • Mac OS X


  • Windows

Computational Tools

Text Editors

Publications

All my publications on INSPIRE
  1. The Curious Case of Leading Transcendentality: Three Point Form Factors
    Taushif Ahmed, Pulak Banerjee, Amlan Chakraborty, Prasanna K. Dhanid and V. Ravindran
    [Abstract] [PDF] []
  2. Two-loop Doubly Massive Four-Point Amplitude Involving a half-BPS and Konishi Operator
    Taushif Ahmed, and Prasanna K. Dhani
    [Abstract] [PDF] [Journal] JHEP 1905 (2019) 066
  3. High energy behaviour of form factors
    Taushif Ahmed, Johannes M. Henn and Matthias Steinhauser
    [Abstract] [PDF] [Journal] JHEP 1706 (2017) 125
  4. Three loop form factors of a massive spin-2 particle with nonuniversal coupling
    Taushif Ahmed, Pulak Banerjee, Prasanna K. Dhani, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] Phys.Rev. D95 (2017) no.3, 034035
  5. Konishi Form Factor at Three Loop in {\cal N} = 4 SYM
    Taushif Ahmed, Pulak Banerjee, Prasanna K. Dhani, Narayan Rana, V. Ravindran and Satyajit Seth
    [Abstract] [PDF] [Journal] Phys.Rev. D95 (2017) no.8, 085019
  6. Pseudo-scalar Higgs boson form factors at 3 loops in QCD
    Taushif Ahmed, Thomas Gehrman, Prakash Mathews, Narayan Rana and V. Ravindran
    [PDF] PoS LL2016 (2016) 026
  7. Two-loop QCD Correction to Massive Spin-2 Resonance → q q-bar g
    Taushif Ahmed, Goutam Das, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] Eur.Phys.J. C76 (2016) no.12, 667
  8. NNLO QCD Corrections to the Drell-Yan Cross Section in Models of TeV-Scale Gravity
    Taushif Ahmed, Pulak Banerjee, Prasanna K. Dhani, M.C. Kumar, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] Eur.Phys.J. C77 (2017) no.1, 22
  9. Pseudo-scalar Higgs boson production at N3LO_A+N3LL'
    Taushif Ahmed, Marco Bonvini, M.C. Kumar, Prakash Mathews, Narayan Rana, V. Ravindran and Luca Rottoli
    [Abstract] [PDF] [Journal] Eur.Phys.J. C76 (2016) no.12, 663
  10. Pseudo-scalar Higgs Boson Production at Threshold N3LO and N3LL QCD
    Taushif Ahmed, M. C. Kumar, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] Eur.Phys.J. C76 (2016) no.6, 355
  11. Pseudo-scalar Form Factors at Three Loops in QCD
    Taushif Ahmed, Thomas Gehrmann, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] JHEP 1511 (2015) 169
  12. Spin-2 Form Factors at Three Loop in QCD
    Taushif Ahmed, Goutam Das, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] JHEP 1512 (2015) 084
  13. RG improved Higgs boson production to N3LO in QCD
    Taushif Ahmed, Goutam Das, M. C. Kumar, Narayan Rana and V. Ravindran
    [Abstract] [PDF]
  14. Higgs Rapidity Distribution in b b-bar Annihilation at Threshold in N3LO QCD
    Taushif Ahmed, M. K. Mandal, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] JHEP 1502 (2015) 131
  15. Higgs boson production through b b-bar annihilation at threshold in N3LO QCD
    Taushif Ahmed, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] JHEP 1410 (2014) 139
  16. Two-loop QCD corrections to Higgs → b + b-bar + g amplitude
    Taushif Ahmed, Maguni Mahakhud, Prakash Mathews, Narayan Rana, V. Ravindran
    [Abstract] [PDF] [Journal] JHEP 1408 (2014) 075
  17. Rapidity Distributions in Drell-Yan and Higgs Productions at Threshold to Third Order in QCD
    Taushif Ahmed, M. K. Mandal, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] Phys.Rev.Lett. 113 (2014) 212003
  18. Drell-Yan Production at Threshold to Third Order in QCD
    Taushif Ahmed, Maguni Mahakhud, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] Phys.Rev.Lett. 113 (2014) 112002
  19. Two-Loop QCD Correction to massive spin-2 resonance → 3-gluons
    Taushif Ahmed, Maguni Mahakhud, Prakash Mathews, Narayan Rana and V. Ravindran
    [Abstract] [PDF] [Journal] JHEP 1405 (2014) 107

Miscellaneous

My PhD Thesis



  • QCD Radiative Corrections to Higgs Physics
    Supervisor: Prof. V. Ravindran
    Abstract
    pdf



Some of my Project Reports during M.Sc.



  • Dirac and Majorana Neutrino
    Supervisor: Prof. Biswarup Mukhopadhyaya
    pdf




  • Intrinsic Parity of Neutral Pion
    Supervisor: Prof. Biswarup Mukhopadhyaya
    pdf




  • The Anti-Proton
    Supervisor: Prof. Biswarup Mukhopadhyaya
    pdf




  • Spin Coherent State
    Supervisor: Prof. Rajesh Gopakumar
    pdf




  • Unruh Effect
    Supervisor: Prof. Ashoke Sen
    pdf




  • Classical Analogy of Fano Interference
    Supervisor: Dr. Ashok Mohapatra
    pdf



Lecture Notes

Seminar



  • Ph.D. Defence, IMSc, Chennai, India 2016
    QCD Radiative Corrections to Higgs Physics
    pdf



  • Seminar at University of Buffalo, USA, 2016
    Pseudo-Scalar Form Factors at 3-loop in QCD
    pdf



  • Seminar at Various Universities in Europe, 2015
    Threshold Corrections to DY and Higgs at N3LO QCD
    pdf



  • Seminar at HRI, India, 2014
    Two Loop QCD Corrections To Massive Spin-2 Resonance -> 3-gluons
    pdf




Teaching Assistant

Useful Webpages for High Energy Physicists

Not-So-Useful Webpages

Contacts

Max-Planck-Institut für Physik
(Werner-Heisenberg-Institut)
Föhringer Ring 6
80805 München
Phone : +49-89-32354-200

Office No. 321