Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy

Abstract: We consider the transverse-momentum (q<inf>T</inf>) distribution of a diphoton pair produced in hadron collisions. At small values of q<inf>T</inf>, we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accura...

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Detalles Bibliográficos
Autores principales:	Cieri, L., Coradeschi, F., de Florian, D.
Formato:	JOUR
Materias:	Hadronic Colliders QCD Phenomenology
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_11266708_v2015_n6_p_Cieri
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_11266708_v2015_n6_p_Cieri
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spelling	todo:paper_11266708_v2015_n6_p_Cieri2023-10-03T16:07:21Z Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy Cieri, L. Coradeschi, F. de Florian, D. Hadronic Colliders QCD Phenomenology Abstract: We consider the transverse-momentum (q<inf>T</inf>) distribution of a diphoton pair produced in hadron collisions. At small values of q<inf>T</inf>, we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. At intermediate and large values of q<inf>T</inf>, we consistently combine resummation with the known next-to-leading order perturbative result. All perturbative terms up to order α<inf>S</inf> 2 are included in our computation which, after integration over q<inf>T</inf>, reproduces the known next- to-next-to-leading order result for the diphoton pair production total cross section. We present a comparison with LHC data and an estimate of the perturbative accuracy of the theoretical calculation by performing the corresponding variation of scales. In general we observe that the effect of the resummation is not only to recover the predictivity of the calculation at small transverse momentum, but also to improve substantially the agreement with the experimental data. © 2015, The Author(s). Fil:Cieri, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:de Florian, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2015_n6_p_Cieri
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Hadronic Colliders QCD Phenomenology
spellingShingle	Hadronic Colliders QCD Phenomenology Cieri, L. Coradeschi, F. de Florian, D. Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
topic_facet	Hadronic Colliders QCD Phenomenology
description	Abstract: We consider the transverse-momentum (q<inf>T</inf>) distribution of a diphoton pair produced in hadron collisions. At small values of q<inf>T</inf>, we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. At intermediate and large values of q<inf>T</inf>, we consistently combine resummation with the known next-to-leading order perturbative result. All perturbative terms up to order α<inf>S</inf> 2 are included in our computation which, after integration over q<inf>T</inf>, reproduces the known next- to-next-to-leading order result for the diphoton pair production total cross section. We present a comparison with LHC data and an estimate of the perturbative accuracy of the theoretical calculation by performing the corresponding variation of scales. In general we observe that the effect of the resummation is not only to recover the predictivity of the calculation at small transverse momentum, but also to improve substantially the agreement with the experimental data. © 2015, The Author(s).
format	JOUR
author	Cieri, L. Coradeschi, F. de Florian, D.
author_facet	Cieri, L. Coradeschi, F. de Florian, D.
author_sort	Cieri, L.
title	Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
title_short	Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
title_full	Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
title_fullStr	Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
title_full_unstemmed	Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
title_sort	diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy
url	http://hdl.handle.net/20.500.12110/paper_11266708_v2015_n6_p_Cieri
work_keys_str_mv	AT cieril diphotonproductionathadroncolliderstransversemomentumresummationatnexttonexttoleadinglogarithmicaccuracy AT coradeschif diphotonproductionathadroncolliderstransversemomentumresummationatnexttonexttoleadinglogarithmicaccuracy AT defloriand diphotonproductionathadroncolliderstransversemomentumresummationatnexttonexttoleadinglogarithmicaccuracy
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Diphoton production at hadron colliders: transverse-momentum resummation at next-to-next-to-leading logarithmic accuracy

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