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Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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2011 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 83, no 5Article in journal (Refereed) Published
Abstract [en]

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy root s = 7 TeV is presented. The measurement covers the pseudorapidity ranges vertical bar eta(gamma)vertical bar < 1: 37 and 1: 52 <= vertical bar eta(gamma)vertical bar < 1: 81 in the transverse energy range 15 <= E(T)(gamma) < 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.

Place, publisher, year, edition, pages
2011. Vol. 83, no 5
Keyword [en]
SUPERSYMMETRIC EXTENSION, PARTON DISTRIBUTIONS, HADRON-COLLISIONS, HERA, PHOTOPRODUCTION, FRAGMENTATION, SCATTERING, COLLIDER, MODEL
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-88995DOI: 10.1103/PhysRevD.83.052005ISI: 000288533200001Scopus ID: 2-s2.0-79960772853OAI: oai:DiVA.org:kth-88995DiVA: diva2:502644
Note
QC 20120216Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2017-12-07Bibliographically approved

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