Measurement of the production cross section for pairs of isolated photons in pp collisions at √s = 7 TeV
Journal of High Energy Physics, vol.2012, no.1, 2012 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 2012 Issue: 1
- Publication Date: 2012
- Doi Number: 10.1007/jhep01(2012)133
- Journal Name: Journal of High Energy Physics
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Keywords: Hadron-hadron scattering
- Open Archive Collection: AVESIS Open Access Collection
- Yıldız Technical University Affiliated: Yes
Abstract
Abstract: The integrated and differential cross sections for the production of pairs of isolated photons is measured in proton-proton collisions at a centre-of-mass energy of 7TeV with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 36 pb-1 is analysed. A next-to-leading-order perturbative QCD calculation is compared to the measurements. A discrepancy is observed for regions of the phase space where the two photons have an azimuthal angle difference Δ ℓ ≲. 2:8 rad. © SISSA 2012.