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Theoretical physicists working at a blackboard collaboration pod in the Beecroft building.

Dr Herschel Chawdhry

Postdoctoral researcher

Sub department

  • Rudolf Peierls Centre for Theoretical Physics

Research groups

  • Particle theory
herschel.chawdhry@physics.ox.ac.uk
Telephone: 01865 273995
Rudolf Peierls Centre for Theoretical Physics, room 40.06
  • About
  • Publications

Quantum simulation of colour in perturbative quantum chromodynamics

ArXiv 2303.04818 (2023)

Authors:

Herschel A Chawdhry, Mathieu Pellen
Details from ArXiV

Mixed QCD-electroweak corrections to dilepton production at the LHC in the high invariant mass region

ArXiv 2203.11237 (2022)

Authors:

Federico Buccioni, Fabrizio Caola, Herschel A Chawdhry, Federica Devoto, Matthias Heller, Andreas von Manteuffel, Kirill Melnikov, Raoul Röntsch, Chiara Signorile-Signorile
Details from ArXiV

NNLO QCD corrections to diphoton production with an additional jet at the LHC

Journal of High Energy Physics Springer Nature 2021:9 (2021) 93

Authors:

Herschel A Chawdhry, Michal Czakon, Alexander Mitov, Rene Poncelet

Abstract:

We calculate the NNLO QCD corrections to diphoton production with an additional jet at the LHC. Our calculation represents the first NNLO-accurate prediction for the transverse momentum distribution of the diphoton system. The improvement in the accuracy of the theoretical prediction is significant, by a factor of up to four relative to NLO QCD as estimated through scale variations. Our calculation is exact except for the finite remainder of the two-loop amplitude which is included at leading color. The numerical impact of this approximated contribution is small. The results of this work are expected to further our understanding of the Higgs boson sector and of the behavior of higher-order corrections to LHC processes.
More details from the publisher
Details from ORA
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Details from ArXiV

Two-loop leading-colour QCD helicity amplitudes for two-photon plus jet production at the LHC

Journal of High Energy Physics Springer Nature 2021:7 (2021) 164

Authors:

Herschel A Chawdhry, Michal Czakon, Alexander Mitov, Rene Poncelet

Abstract:

We calculate the complete set of two-loop leading-colour QCD helicity amplitudes for γγj-production at hadron colliders. Our results are presented in a compact, fully-analytical form.
More details from the publisher
Details from ORA
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Details from ArXiV

Two-loop leading-color helicity amplitudes for three-photon production at the LHC

Journal of High Energy Physics Springer Nature 2021:6 (2021) 150

Authors:

Herschel A Chawdhry, Michal Czakon, Alexander Mitov, Rene Poncelet

Abstract:

We calculate all planar contributions to the two-loop massless helicity amplitudes for the process qq¯¯ → γγγ. The results are presented in fully analytic form in terms of the functional basis proposed recently by Chicherin and Sotnikov. With this publication we provide the two-loop contributions already used by us in the NNLO QCD calculation of the LHC process pp → γγγ [Chawdhry et al. (2019)]. Our results agree with a recent calculation of the same amplitude [Abreu et al. (2020)] which was performed using different techniques. We combine several modern computational techniques, notably, analytic solutions for the IBP identities, finite-field reconstruction techniques as well as the recent approach [Chen (2019)] for efficiently projecting helicity amplitudes. Our framework appears well-suited for the calculation of two-loop multileg amplitudes for which complete sets of master integrals exist.
More details from the publisher
Details from ORA
More details
Details from ArXiV

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