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

The CMS collaboration

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

A measurement of differential cross sections for the production of a pair of isolated photons in proton–proton collisions at √s=7TeV is presented. The data sample corresponds to an integrated luminosity of 5.0fb-1 collected 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 25GeV respectively, in the pseudorapidity range |η|<2.5|η|∉[1.441.57] 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 transverse momentum, the azimuthal angle difference between the 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.

Original languageEnglish
Article number3129
Pages (from-to)1-30
Number of pages30
JournalEuropean Physical Journal C
Volume74
Issue number11
DOIs
Publication statusPublished - Nov 15 2014

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Photons
collisions
cross sections
photons
transverse momentum
Luminance
isolation
Momentum
templates
quantum chromodynamics
luminosity
Detectors
detectors
predictions
energy

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at s=7TeV. / The CMS collaboration.

In: European Physical Journal C, Vol. 74, No. 11, 3129, 15.11.2014, p. 1-30.

Research output: Contribution to journalArticle

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