95 citations · 457 across the 20 of their papers we have counts for
22 papers
How to choose a good rational basis for elliptic Feynman integrals?
Ekta Chaubey, Vasily Sotnikov
Representing multi-loop scattering amplitudes as linear combinations of multivalued transcendental functions with process-dependent rational coefficients has long been understood t…
Light-by-light scattering: asymptotic expansions, Coulomb resummation and NLO corrections
Ajjath A H, Ekta Chaubey, Hua-Sheng Shao
Light-by-light (LbL) scattering is one of the earliest predictions of quantum electrodynamics (QED). Interest in this process has been renewed following its experimental observatio…
Estimating power corrections for the Drell-Yan Process
Ekta Chaubey, Pooja Mukherjee
We study power corrections in the Drell-Yan (DY) process using state-of-the-art predictions for both neutral and charged current production. For both types of DY processes, we acco…
A comprehensive analysis of Drell-Yan production uncertainties and mass effects at moderate and low dilepton masses
Ekta Chaubey, Claude Duhr, Rhorry Gauld +1
We present a thorough investigation of the sources of uncertainties to the Drell-Yan production using state-of-the-art predictions for both neutral and charged current channels, fo…
Elliptic leading singularities and canonical integrands
Ekta Chaubey, Vasily Sotnikov
In the well-studied genus zero case, bases of integrands with integer leading singularities define Feynman integrals that automatically satisfy differential equati…
Two-loop helicity amplitudes for diphoton production with massive quark loop
Taushif Ahmed, Amlan Chakraborty, Ekta Chaubey +1
We compute two-loop helicity amplitudes in QCD for diphoton production through quark- and gluon-initiated channels, accounting for a massive internal quark loop by keeping its full…
Two-loop non-planar four-point topology with massive internal loop
Taushif Ahmed, Ekta Chaubey, Mandeep Kaur +1
We study a set of two-loop non-planar master integrals needed for the NNLO QCD corrections to diphoton and dijet production at hadron colliders. The top-sector topology contains an…
Two-loop massive QCD and QED helicity amplitudes for light-by-light scattering
Ajjath A H, Ekta Chaubey, Hua-Sheng Shao
We present the analytic and compact two-loop helicity amplitudes for QCD and QED corrections to the light-by-light scattering process with massive internal fermions. We express the…
Light-by-Light Scattering at Next-to-Leading Order in QCD and QED
Ajjath A H, Ekta Chaubey, Mathijs Fraaije +2
The recent experimental observation of Light-by-Light (LbL) scattering at the Large Hadron Collider has revived interest in this fundamental process, and especially of the accurate…
Two-loop master integrals for a planar topology contributing to
Simon Badger, Matteo Becchetti, Ekta Chaubey +1
We consider the case of a two-loop five-point pentagon-box integral configuration with one internal massive propagator that contributes to top-quark pair production in association…
Three-loop master integrals for the Higgs boson self-energy with internal top-quarks and W-bosons
Ekta Chaubey, Ina Hönemann, Stefan Weinzierl
We consider the full set of master integrals with internal top-and -propagators contributing to the three-loop Higgs self-energy diagrams of order . We sp…
Analytic representations of two-loop scattering amplitudes with internal masses
Ekta Chaubey
We highlight the latest developments in computing higher-order scattering amplitudes with massive internal propagators. The contributing Feynman integrals often lead to special cla…
Master integrals for corrections to
Ekta Chaubey, Mandeep Kaur, Ambresh Shivaji
We present analytic results for all the Feynman integrals relevant for virtual corrections to decay. We use the method of differential equ…
Functions Beyond Multiple Polylogarithms for Precision Collider Physics
Jacob L. Bourjaily, Johannes Broedel, Ekta Chaubey +14
Feynman diagrams constitute one of the essential ingredients for making precision predictions for collider experiments. Yet, while the simplest Feynman diagrams can be evaluated in…
One-loop QCD helicity amplitudes for to
Simon Badger, Matteo Becchetti, Ekta Chaubey +2
We compute helicity amplitudes for the one-loop QCD corrections to top-quark pair production analytically in terms of a set of uniformly transcendental master integrals. We provide…
Two-loop leading colour QCD helicity amplitudes for top quark pair production in the gluon fusion channel
Simon Badger, Ekta Chaubey, Heribertus Bayu Hartanto +1
We present a complete set of analytic helicity amplitudes for top quark pair production via gluon fusion at two-loops in QCD. For the first time, we include corrections due to mass…
Two-loop master integrals for the mixed QCD-electroweak corrections for through a -coupling
Ekta Chaubey, Stefan Weinzierl
We present the two-loop master integrals relevant to the -corrections to the decay through a -coupling. We keep the full…
From elliptic curves to Feynman integrals
Luise Adams, Ekta Chaubey, Stefan Weinzierl
In this talk we discuss Feynman integrals which are related to elliptic curves. We show with the help of an explicit example that in the set of master integrals more than one ellip…
Analytic results for the planar double box integral relevant to top-pair production with a closed top loop
Luise Adams, Ekta Chaubey, Stefan Weinzierl
In this article we give the details on the analytic calculation of the master integrals for the planar double box integral relevant to top-pair production with a closed top loop. W…
The planar double box integral for top pair production with a closed top loop to all orders in the dimensional regularisation parameter
Luise Adams, Ekta Chaubey, Stefan Weinzierl
We compute systematically for the planar double box Feynman integral relevant to top pair production with a closed top loop the Laurent expansion in the dimensional regularisation…
Differential equations for Feynman integrals beyond multiple polylogarithms
Luise Adams, Christian Bogner, Ekta Chaubey +2
Differential equations are a powerful tool to tackle Feynman integrals. In this talk we discuss recent progress, where the method of differential equations has been applied to Feyn…
Simplifying differential equations for multi-scale Feynman integrals beyond multiple polylogarithms
Luise Adams, Ekta Chaubey, Stefan Weinzierl
In this paper we exploit factorisation properties of Picard-Fuchs operators to decouple differential equations for multi-scale Feynman integrals. The algorithm reduces the differen…