Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Charalampos Anastasiou"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 11, Pp 1-48 (2024)
Abstract The computation of two-loop amplitudes for the production of multiple Higgs and electroweak gauge bosons via gluon fusion with exact dependence on quark masses relies primarily on numerical methods. We propose a framework that enables their
Externí odkaz:
https://doaj.org/article/4180082b70c642df9aec00cebdb173dc
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 1, Pp 1-88 (2024)
Abstract We develop a new way to analytically calculate loop integrals in the Effective Field Theory of Large Scale-Structure. Previous available methods show severe limitations beyond the one-loop power spectrum due to analytical challenges and comp
Externí odkaz:
https://doaj.org/article/e58495c29dda4155aa0898d98d4a4bfc
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 12, Pp 1-30 (2023)
Abstract The computational cost associated with reducing tensor integrals to scalar integrals using the Passarino-Veltman method is dominated by the diagonalisation of large systems of equations. These systems of equations are sized according to the
Externí odkaz:
https://doaj.org/article/0ed32c34b3984634b4c2720d00fdb89e
Autor:
Charalampos Anastasiou, George Sterman
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-59 (2023)
Abstract We describe the implementation of infrared subtractions for two-loop QCD corrections to quark-antiquark annihilation to electroweak final states. The subtractions are given as form-factor integrands whose integrals are known. The resulting s
Externí odkaz:
https://doaj.org/article/2a60d9f190cb4abf9ff1129ec9c5305c
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-83 (2021)
Abstract We study the singularity structure of two-loop QED amplitudes for the production of multiple off-shell photons in massless electron-positron annihilation and develop counterterms that remove their infrared and ultraviolet divergences point b
Externí odkaz:
https://doaj.org/article/f0d30d4b28c04996a79840bc0f2986a4
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-27 (2020)
Abstract We study the amplitude of the Higgs boson production in gluon fusion mediated by a light quark loop and evaluate the logarithmically enhanced radiative corrections to the next-to-leading logarithmic approximation which sums up the terms of t
Externí odkaz:
https://doaj.org/article/09400f40e94f49dc8862f30544ad5068
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-34 (2020)
Abstract We provide two two-loop amplitudes relevant for precision Higgs physics. The first is the two-loop amplitude for Higgs boson production through gluon fusion with exact dependence on the top quark mass up to squared order in the dimensional r
Externí odkaz:
https://doaj.org/article/016ed69df0ee4a3a8de77bb71b0fe3f2
Autor:
Charalampos Anastasiou, George Sterman
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 7, Pp 1-49 (2019)
Abstract Feynman amplitudes at higher orders in perturbation theory generically have complex singular structures. Notwithstanding the emergence of many powerful new methods, the presence of infrared divergences poses significant challenges for their
Externí odkaz:
https://doaj.org/article/7ab4f5e3c97e4d939ed2b6df4c7de247
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 5, Pp 1-22 (2019)
Abstract We present one-loop contributions to the fully differential Higgs boson gluon-fusion cross-section for Higgs production via gluon fusion. Our results constitute a necessary ingredient of a complete N3LO determination of the cross-section. We
Externí odkaz:
https://doaj.org/article/88c61ff19569466890369c133f495430
Autor:
Charalampos Anastasiou, Vittorio Del Duca, Elisabetta Furlan, Bernhard Mistlberger, Francesco Moriello, Armin Schweitzer, Caterina Specchia
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-17 (2019)
Abstract We compute the mixed QCD-electroweak corrections to the cross section for the production of a Higgs boson via gluon fusion, in the limit of a small mass of the electroweak gauge bosons. This limit is regular and we calculate it by setting th
Externí odkaz:
https://doaj.org/article/f7799642397b4c2bbff5ab7c36fc3bcb