Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Simon Badger"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-41 (2024)
Abstract We compute the differential equations for the two remaining integral topologies contributing to the leading colour two-loop amplitudes for pp → t t ¯ j $$ t\overline{t}j $$ . We derive differential equations for the master integrals by so
Externí odkaz:
https://doaj.org/article/7a5fb3b6aaeb47c3beafe07d1fd93a9d
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-30 (2023)
Abstract We compute the two-loop QED helicity amplitudes for the scattering of a lepton pair with an off-shell and an on-shell photon, 0 → ℓ ℓ ¯ γγ $$ \ell \overline{\ell}\gamma \gamma $$ *, using the approximation of massless leptons. We ex
Externí odkaz:
https://doaj.org/article/e15d1603b45946e9b858c4c0b6a687d4
Autor:
Simon Badger, Michał Czakon, Heribertus Bayu Hartanto, Ryan Moodie, Tiziano Peraro, Rene Poncelet, Simone Zoia
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-39 (2023)
Abstract In this work, we provide a comprehensive set of differential cross-section distributions for photon + di-jet production in proton-proton collisions with next-to-next-to-leading order precision in massless QCD. The event selection corresponds
Externí odkaz:
https://doaj.org/article/2e72a69629c94c61b4976fb9c403a3e5
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-35 (2023)
Abstract 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 with a jet at hadron colliders. We construct the system of di
Externí odkaz:
https://doaj.org/article/564b64c4c5664bfca75c0ae61d70f952
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 6, Pp 1-35 (2022)
Abstract 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 corrections up to O(ε 2) in the dimensional regulator for t
Externí odkaz:
https://doaj.org/article/ce9e7209481341e2a053b56455a03fda
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 5, Pp 1-37 (2022)
Abstract We present the two-loop leading colour QCD helicity amplitudes for the process pp → W (→ lν)γ + j. We implement a complete reduction of the amplitudes, including the leptonic decay of the W-boson, using finite field arithmetic, and ext
Externí odkaz:
https://doaj.org/article/ecbf9eb304d84eec83b38ac406af7715
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-36 (2021)
Abstract We compute the two-loop QCD helicity amplitudes for the production of a Higgs boson in association with a bottom quark pair at a hadron collider. We take the approximations of leading colour and work in the five flavour scheme, where the bot
Externí odkaz:
https://doaj.org/article/f6e72a87a381425db8c84377d40ee2ad
Autor:
Simon Badger, Christian Brønnum-Hansen, Dmitry Chicherin, Thomas Gehrmann, Heribertus Bayu Hartanto, Johannes Henn, Matteo Marcoli, Ryan Moodie, Tiziano Peraro, Simone Zoia
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 11, Pp 1-29 (2021)
Abstract We present an analytic computation of the gluon-initiated contribution to diphoton plus jet production at hadron colliders up to two loops in QCD. We reconstruct the analytic form of the finite remainders from numerical evaluations over fini
Externí odkaz:
https://doaj.org/article/5338b26fd5ca45729e4a51bc136463f3
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-30 (2021)
Abstract Machine learning technology has the potential to dramatically optimise event generation and simulations. We continue to investigate the use of neural networks to approximate matrix elements for high-multiplicity scattering processes. We focu
Externí odkaz:
https://doaj.org/article/06203b8a065a4822ad59893f9b068128
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 6, Pp 1-38 (2021)
Abstract 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 massive fermion loops which give rise to integrals over elliptic
Externí odkaz:
https://doaj.org/article/327cde1e30414b2f93deb09c7f170585