Quark and gluon spin-2 form factors to two loops in QCD

We present two-loop QCD corrections to the quark form factor from the amplitude G∗ → qq¯ and the gluon form factor from G∗ → gg in SU(N) gauge theory with nf light flavours. We use ddimensional regularisation and the results are presented to all orders in ε = d - 4. These form factors can be used to...

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Autor principal:	de Florian, Daniel Enrique
Publicado:	2014
Materias:	Differential equations Elementary particles High energy physics Integrodifferential equations Quantum theory Extra dimensions Form factors Gauge theory Next to next to leading orders Regularisation Scattering process Standard model Vector boson Approximation theory
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18248039_v2014-January_n_p_DeFlorian http://hdl.handle.net/20.500.12110/paper_18248039_v2014-January_n_p_DeFlorian
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_18248039_v2014-January_n_p_DeFlorian
record_format	dspace
spelling	paper:paper_18248039_v2014-January_n_p_DeFlorian2023-06-08T16:29:16Z Quark and gluon spin-2 form factors to two loops in QCD de Florian, Daniel Enrique Differential equations Elementary particles High energy physics Integrodifferential equations Quantum theory Extra dimensions Form factors Gauge theory Next to next to leading orders Regularisation Scattering process Standard model Vector boson Approximation theory We present two-loop QCD corrections to the quark form factor from the amplitude G∗ → qq¯ and the gluon form factor from G∗ → gg in SU(N) gauge theory with nf light flavours. We use ddimensional regularisation and the results are presented to all orders in ε = d - 4. These form factors can be used to obtain next-to-next-to-leading order QCD corrections to hadronic scattering processes in large extra-dimension model where Kaluza-Klein graviton modes couple to Standard Model fields. We find that the form factors satisfy Sudakov integro-differential equation and the resulting cusp, collinear and soft anomalous dimensions are identical to those of electroweak vector boson and gluon form factors. We establish the universal behaviour of the infrared singularities in accordance with the proposal by Catani. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. Fil:De Florian, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18248039_v2014-January_n_p_DeFlorian http://hdl.handle.net/20.500.12110/paper_18248039_v2014-January_n_p_DeFlorian
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Differential equations Elementary particles High energy physics Integrodifferential equations Quantum theory Extra dimensions Form factors Gauge theory Next to next to leading orders Regularisation Scattering process Standard model Vector boson Approximation theory
spellingShingle	Differential equations Elementary particles High energy physics Integrodifferential equations Quantum theory Extra dimensions Form factors Gauge theory Next to next to leading orders Regularisation Scattering process Standard model Vector boson Approximation theory de Florian, Daniel Enrique Quark and gluon spin-2 form factors to two loops in QCD
topic_facet	Differential equations Elementary particles High energy physics Integrodifferential equations Quantum theory Extra dimensions Form factors Gauge theory Next to next to leading orders Regularisation Scattering process Standard model Vector boson Approximation theory
description	We present two-loop QCD corrections to the quark form factor from the amplitude G∗ → qq¯ and the gluon form factor from G∗ → gg in SU(N) gauge theory with nf light flavours. We use ddimensional regularisation and the results are presented to all orders in ε = d - 4. These form factors can be used to obtain next-to-next-to-leading order QCD corrections to hadronic scattering processes in large extra-dimension model where Kaluza-Klein graviton modes couple to Standard Model fields. We find that the form factors satisfy Sudakov integro-differential equation and the resulting cusp, collinear and soft anomalous dimensions are identical to those of electroweak vector boson and gluon form factors. We establish the universal behaviour of the infrared singularities in accordance with the proposal by Catani. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
author	de Florian, Daniel Enrique
author_facet	de Florian, Daniel Enrique
author_sort	de Florian, Daniel Enrique
title	Quark and gluon spin-2 form factors to two loops in QCD
title_short	Quark and gluon spin-2 form factors to two loops in QCD
title_full	Quark and gluon spin-2 form factors to two loops in QCD
title_fullStr	Quark and gluon spin-2 form factors to two loops in QCD
title_full_unstemmed	Quark and gluon spin-2 form factors to two loops in QCD
title_sort	quark and gluon spin-2 form factors to two loops in qcd
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18248039_v2014-January_n_p_DeFlorian http://hdl.handle.net/20.500.12110/paper_18248039_v2014-January_n_p_DeFlorian
work_keys_str_mv	AT defloriandanielenrique quarkandgluonspin2formfactorstotwoloopsinqcd
_version_	1768542859900747776

Quark and gluon spin-2 form factors to two loops in QCD

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