Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at âˆšs = 7TeV

Serguei Chatrchyan; Javier Andrés Brochero Cifuentes; José Iban Cabrillo Bartolomé; Alicia Calderón Tazón; Jorge Duarte Campderros; Marcos Fernández García; Gervasio Gómez Gramuglio; Francisco Javier González Sánchez; Alberto Graziano; María Amparo López Virto; Jesús Marco Lucas; Rafael José Marco Lucas; Celso Martínez Rivero; Francisco Matorras Weinig; Francisca Javiela Muñoz Sánchez; Jonatan Piedra Gómez; Teresa Rodrigo Anoro; Ana Yaiza Rodríguez Marrero; Alberto Ruiz Jimeno; Luca Scodellaro; Ivan Vila Álvarez; Rocío Vilar Cortabitarte

doi:10.1140/epjc/s10052-014-3129-3

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Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at âˆšs = 7TeV

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Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at âˆšs = 7TeV

Serguei Chatrchyan, Javier Andrés Brochero Cifuentes, José Iban Cabrillo Bartolomé, Alicia Calderón Tazón, Jorge Duarte Campderros, Marcos Fernández García, Gervasio Gómez Gramuglio, Francisco Javier González Sánchez, Alberto Graziano, María Amparo López Virto, …

The European physical journal. C, Particles and fields, Vol.74(11), 3129

11/01/2014

DOI: 10.1140/epjc/s10052-014-3129-3

PMID: 25814874

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Abstract

A measurement of differential cross sections for the production of a pair of isolated photons in proton–proton collisions at √s=7 TeV is presented.The data sample corresponds to an integrated luminosity of 5.0 fb−1collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 GeV respectively, in the pseudorapidity range|η|<2.5,|η|/∈[1.44,1.57]and with an angular separation ?R>0.45, is 17.2±0.2(stat)±1.9 (syst)±0.4 (lumi)pb. Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton trans-verse momentum, the azimuthal angle difference betweenthe two photons, and the cosine of the polar angle in the Collins–Soper reference frame of the diphoton system. The results are compared to theoretical predictions at leading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics.

High Energy Physics

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Nuclear Experiment

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Title: Subtitle: Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at âˆšs = 7TeV
Creators: Serguei Chatrchyan - Yerevan Physics Institute
Javier Andrés Brochero Cifuentes
José Iban Cabrillo Bartolomé
Alicia Calderón Tazón
Jorge Duarte Campderros
Marcos Fernández García
Gervasio Gómez Gramuglio
Francisco Javier González Sánchez
Alberto Graziano
María Amparo López Virto
Jesús Marco Lucas
Rafael José Marco Lucas
Celso Martínez Rivero
Francisco Matorras Weinig
Francisca Javiela Muñoz Sánchez
Jonatan Piedra Gómez
Teresa Rodrigo Anoro
Ana Yaiza Rodríguez Marrero
Alberto Ruiz Jimeno
Luca Scodellaro
Ivan Vila Álvarez
Rocío Vilar Cortabitarte
Contributors: Y Onel (Contributor) - University of Iowa, Physics and Astronomy
CMS Collaboration (Contributor)
Resource Type: Journal article
Publication Details: The European physical journal. C, Particles and fields, Vol.74(11), 3129
DOI: 10.1140/epjc/s10052-014-3129-3
PMID: 25814874
NLM abbreviation: Eur Phys J C Part Fields
ISSN: 1434-6044
eISSN: 1434-6052
Publisher: Springer
Language: English
Date published: 11/01/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984199926802771

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