Measurement of the production cross section of an isolated photon associated with jets in proton-proton collisions at root s=7 TeV with the ATLAS detector
Popovic, D. S.
Vranješ Milosavljević, Marija
ATLAS Collaboration (ukupan broj autora: 3037)
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A measurement of the cross section for the production of an isolated photon in association with jets in proton-proton collisions at a center-of-mass energy root s = 7 TeV is presented. Photons are reconstructed in the pseudorapidity range vertical bar eta(gamma)vertical bar LT 1.37 and with a transverse energy E-T(gamma) GT 25 GeV. Jets are reconstructed in the rapidity range vertical bar y(jet)vertical bar LT 4.4 and with a transverse momentum p(T)(jet) GT 20 GeV. The differential cross section d sigma/dE(T)(gamma) is measured, as a function of the photon transverse energy, for three different rapidity ranges of the leading-p(T) jet: vertical bar y(jet)vertical bar LT 1.2, 1.2 LT = vertical bar y(jet)vertical bar LT 2.8 and 2.8 LT = vertical bar y(jet)vertical bar LT 4.4. For each rapidity configuration the same-sign (eta(gamma)y(jet) GT = 0) and opposite-sign (eta(gamma) y(jet) LT 0) cases are studied separately. The results are based on an integrated luminosity of 37 pb(-1), collect...ed with the ATLAS detector at the LHC. Next-to-leading order perturbative QCD calculations are found to be in fair agreement with the data, except for E-T(gamma) LT = 45 GeV, where the theoretical predictions overestimate the measured cross sections.
Извор:Physical Review D, 2012, 85, 9
- ANPCyT, Argentina, YerPhI, Armenia, ARC, Australia, BMWF, Austria, ANAS, Azerbaijan, SSTC, Belarus, CNPq, Brazil, FAPESP, Brazil, NSERC, Canada, NRC, Canada, CFI, Canada, CERN, CONICYT, Chile, CAS, China, MOST, China, NSFC, China, COLCIENCIAS, Colombia, MSMT CR, Czech Republic, MPO CR, Czech Republic, VSC CR, Czech Republic, DNRF, Denmark, DNSRC, Denmark, Lundbeck Foundation, Denmark, EPLANET, ERC, European Union, IN2P3-CNRS, France, CEA-DSM/IRFU, France, GNAS, Georgia, BMBF, Germany, DFG, Germany, HGF, Germany, MPG, Germany, AvH Foundation, Germany, GSRT, Greece, ISF, Israel, MINERVA, Israel, GIF, Israel, DIP, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, JSPS, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, RCN, Norway, MNiSW, Poland, GRICES, Portugal, FCT, Portugal, MERYS (MECTS), Romania, MES of Russia, Russian Federation, ROSATOM, Russian Federation, JINR, MSTD, Serbia, MSSR, Slovakia, ARRS, Slovenia, MVZT, Slovenia, DST/NRF, South Africa, MICINN, Spain, SRC, Sweden, Wallenberg Foundation, Sweden, SER, Switzerland, SNSF, Switzerland, Canton of Bern, Switzerland, Canton of Geneva, Switzerland, NSC, Taiwan, TAEK, Turkey, STFC, United Kingdom, Royal Society, United Kingdom, Leverhulme Trust, United Kingdom, DOE, United States of America, NSF, United States of America, ICREA
ISSN: 2470-0010 (print); 2470-0029 (electronic)