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

Aad, G.; Abbott, B.; Abdallah, J.; Abdelalim, A. A.; Abdesselam, A.; Abdinov, O.; Abi, B.; Abolins, M.; Abramowicz, H.; Abreu, H.; Acerbi, E.; Acharya, B. S.; Adams, D. L.; Addy, T. N.; Adelman, J.; Aderholz, M.; Adomeit, S.; Adragna, P.; Adye, T.; Aefsky, S.; Aguilar-Saavedra, J A.; Siegrist, James L.

doi:10.1103/PhysRevD.83.052005

Title: Measurement of the inclusive isolated prompt photon cross section in pp collisions at √s=7 TeV with the ATLAS detector

Journal Article · Fri Mar 18 04:00:00 UTC 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI: https://doi.org/10.1103/PhysRevD.83.052005 · OSTI ID:1100069

Aad, G. ^[1]; Abbott, B. ^[2]; Abdallah, J. ^[3]; Abdelalim, A. A. ^[4]; Abdesselam, A. ^[5]; Abdinov, O. ^[6]; Abi, B. ^[7]; Abolins, M. ^[8]; Abramowicz, H. ^[9]; Abreu, H. ^[10]; Acerbi, E. ^[11]; Acharya, B. S. ^[12]; Adams, D. L. ^[13]; Addy, T. N. ^[14]; Adelman, J. ^[15]; Aderholz, M. ^[16]; Adomeit, S. ^[17]; Adragna, P. ^[18]; Adye, T. ^[19]; Aefsky, S. ^[20] more »

Albert-Ludwigs-Universitat, Freiburg (Germany). Fakultat fur Mathematik und Physik
Univ. of Oklahoma, Norman, OK (United States). Homer L. Dodge Dept. of Physics and Astronomy
Universitat Autonoma de Barcelona and ICREA, Barcelona (Spain). Institut de Fisica d' Altes Energies
Universite de Geneve, Geneva (Switzerland). Section de Physique
Oxford Univ., Oxford (United Kingdom). Dept. of Physics
Academy of Sciences, Baku (Azerbaijan). Institute of Physics
Oklahoma State Univ., Stillwater, OK (United States). Dept. of Physics
Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
Tel Aviv Univ., Tel Aviv (Israel). Raymond and Beverly Sackler School of Physics and Astronomy
Univ. Paris-Sud, Orsay (France). LAL
Universita di Milano, Milano (Italy). Dipartimento di Fisica; INFN Sezione di Milano, Milano (Italy)
Collegato di Udine (Italy). INFN Gruppo; ICTP, Trieste (Italy)
Brookhaven National Lab. (BNL), Upton, NY (United States). Physics Dept.
Hampton Univ., Hampton, VA (United States); Dept. of Physics
Yale Univ., New Haven, CT (United States). Dept. of Physics
Werner-Heisenberg-Institut, Muchen (Germany). Max-Planck-Institut fur Physik
Ludwig Maximilian Univ., Munich (Germany). Fakultat fur Physik
Queen Mary Univ. of London, London (United Kingdom). Dept. of Physics
Rutherford Appleton Laboratory, Didcot (United Kingdom). Particle Physics Dept.
Brandeis Univ., Waltham, MA (United States). Dept. of Physics
Universidad de Granada, Granada (Spain). Departamento de Fisica Teorica y del Cosmos and CAFPE
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy √s=7 TeV is presented. The measurement covers the pseudorapidity ranges |η^γ|<1.37 and 1.52≤|η^γ|<1.81 in the transverse energy range 15≤E^γ_T<100 GeV. The results are based on an integrated luminosity of 880 nb^-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. The results are compared to predictions from next-to-leading-order perturbative QCD calculations.

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Sponsoring Organization:: USDOE

OSTI ID:: 1100069

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 5 Vol. 83; ISSN PRVDAQ; ISSN 1550-7998

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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