Measurement of the production cross section for pairs of isolated photons in pp collisions at √<i>s</i>=7 TeV
JOURNAL OF HIGH ENERGY PHYSICS, cilt.2012, sa.1, 2012 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 2012 Sayı: 1
- Basım Tarihi: 2012
- Doi Numarası: 10.1007/jhep01(2012)133
- Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: Hadron-Hadron Scattering
- Dokuz Eylül Üniversitesi Adresli: Hayır
Özet
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 Delta phi less than or similar to 2.8 rad.