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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
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
Vise andre og tillknytning
Rekke forfattare: 30362012 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 85, nr 9, s. 092014-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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 < 1.37 and with a transverse energy E-T(gamma) > 25 GeV. Jets are reconstructed in the rapidity range vertical bar y(jet)vertical bar < 4.4 and with a transverse momentum p(T)(jet) > 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 < 1.2, 1.2 <= vertical bar y(jet)vertical bar < 2.8 and 2.8 <= vertical bar y(jet)vertical bar < 4.4. For each rapidity configuration the same-sign (eta(gamma)y(jet) >= 0) and opposite-sign (eta(gamma) y(jet) < 0) cases are studied separately. The results are based on an integrated luminosity of 37 pb(-1), collected 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) <= 45 GeV, where the theoretical predictions overestimate the measured cross sections.

sted, utgiver, år, opplag, sider
2012. Vol. 85, nr 9, s. 092014-
Emneord [en]
Deep-Inelastic Scattering, Gluon Distribution, Parton Distributions, Pp Collisions, Hera, Photoproduction, Collider, Nucleon, Events, Lhc
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Identifikatorer
URN: urn:nbn:se:kth:diva-98422DOI: 10.1103/PhysRevD.85.092014ISI: 000304400000001Scopus ID: 2-s2.0-84861724352OAI: oai:DiVA.org:kth-98422DiVA, id: diva2:537211
Merknad

QC 20120626.

Tilgjengelig fra: 2012-06-26 Laget: 2012-06-26 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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Strandberg, Jonas

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Jovicevic, JelenaKuwertz, EmmaLund-Jensen, BengtStrandberg, Jonas
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