Caterina Doglioni
Affiliated
Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at s =8 TeV with the ATLAS detector
Author
Summary, in English
A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of s=8 TeV is presented. The results are based on an integrated luminosity of 20.2 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying |ηγ|40 GeV and ET,2γ>30 GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is 16.8±0.8 pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%. © 2017 CERN.
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2017
Language
English
Publication/Series
Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume
95
Issue
11
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Status
Published
ISBN/ISSN/Other
- ISSN: 1550-2368