Measurement of the isolated diphoton cross section in pp collisions at √s=7 TeV with the ATLAS detector

Creators: Aad, G.; Gray, H. M.; Marshall, Z.; Mateos, D. Lopez; Perez, K.; ATLAS Collaboration

Abstract

The ATLAS experiment has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s=7 TeV. The full data set acquired in 2010 is used, corresponding to an integrated luminosity of 37 pb^(-1). The background, consisting of hadronic jets and isolated electrons, is estimated with fully data-driven techniques and subtracted. The differential cross sections, as functions of the di-photon mass (m_(γγ)), total transverse momentum (p_(T,γγ)), and azimuthal separation (Δϕ_(γγ)), are presented and compared to the predictions of next-to-leading-order QCD.

Additional Information

© 2012 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Received 4 July 2011; published 11 January 2012. We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutionswithout whomATLAScould not be operated efficiently.We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC,Australia; BMWF,Austria;ANAS,Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil;NSERC,NRC, and CFI, Canada; CERN; CONICYT, Chile; CAS,MOST, and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR, and VSC CR, Czech Republic; DNRF, DNSRC, and Lundbeck Foundation, Denmark; ARTEMIS, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG, and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP, and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF, and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society, and Leverhulme Trust, United Kingdom; DOE and NSF, USA. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular, from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France),KIT/GridKA (Germany), INFN-CNAF (Italy),NLT1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK), and BNL (USA) and in the Tier-2 facilities worldwide.

Attached Files

Published - Aad2012p17044Phys_Rev_D.pdf

Files

Aad2012p17044Phys_Rev_D.pdf

Files (748.2 kB)

Name	Size	Download all
Aad2012p17044Phys_Rev_D.pdf md5:678ba1bbef1b24865b7b509158a7329a	748.2 kB	Preview Download

Additional details

	All versions	This version
Views	0	0
Downloads	0	0
Data volume	0 Bytes	0 Bytes