Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment

At high pT, direct photons produced in Compton and annihilation QCD leading order processes are associated to a jet in the opposite direction. Such processes are tagged experimentally by identifying leading isolated photons and their correlated associated hadrons in the opposite azimuthal direction....

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Detalles Bibliográficos
Autor principal: Arbor, Nicolas
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysa.2013.02.110
http://cds.cern.ch/record/1496720
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author Arbor, Nicolas
author_facet Arbor, Nicolas
author_sort Arbor, Nicolas
collection CERN
description At high pT, direct photons produced in Compton and annihilation QCD leading order processes are associated to a jet in the opposite direction. Such processes are tagged experimentally by identifying leading isolated photons and their correlated associated hadrons in the opposite azimuthal direction. The jet fragmentation can be estimated from the hadrons and the photon via the imbalance parameter xE. We present the results extracted from gamma-hadron correlations measured by the ALICE experiment in pp collisions at {\sqrt(s)} = 7 TeV. Direct photons are first identified using isolated criteria. Then, the remaining contamination from neutral mesons decay photons is subtracted statistically to extract the xE distributions of isolated photon-hadron and isolated {\pi}^0-hadron correlations.
id cern-1496720
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14967202021-05-03T20:25:32Zdoi:10.1016/j.nuclphysa.2013.02.110http://cds.cern.ch/record/1496720engArbor, NicolasIsolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experimentParticle Physics - ExperimentAt high pT, direct photons produced in Compton and annihilation QCD leading order processes are associated to a jet in the opposite direction. Such processes are tagged experimentally by identifying leading isolated photons and their correlated associated hadrons in the opposite azimuthal direction. The jet fragmentation can be estimated from the hadrons and the photon via the imbalance parameter xE. We present the results extracted from gamma-hadron correlations measured by the ALICE experiment in pp collisions at {\sqrt(s)} = 7 TeV. Direct photons are first identified using isolated criteria. Then, the remaining contamination from neutral mesons decay photons is subtracted statistically to extract the xE distributions of isolated photon-hadron and isolated {\pi}^0-hadron correlations.At high p_T, direct photons produced in Compton and annihilation QCD leading order processes are associated to a jet in the opposite direction. Such processes are tagged experimentally by identifying leading isolated photons and their correlated associated hadrons in the opposite azimuthal direction. The jet fragmentation can be estimated from the hadrons and the photon via the imbalance parameter @g_E=-p->_T^h@?p->_T^@c/|p->_T^h|^2. We present the results extracted from gamma-hadron correlations measured by the ALICE experiment in pp collisions at s=7 TeV. Direct photons are first identified using isolated criteria. Then, the remaining contamination from neutral mesons decay photons is subtracted statistically to extract the @g_E distributions of isolated photon-hadron and isolated @p^0-hadron correlations.At high pT , direct photons produced in Compton and annihilation QCD leading order processes are associated to a jet in the opposite direction. Such processes are tagged experimentally by identifying leading isolated photons and their correlated associated hadrons in the opposite azimuthal direction. The jet fragmentation can be estimated from the hadrons and the photon via the imbalance parameter χE=−p→Th⋅p→Tγ/|p→Th|2 . We present the results extracted from gamma–hadron correlations measured by the ALICE experiment in pp collisions at s=7 TeV . Direct photons are first identified using isolated criteria. Then, the remaining contamination from neutral mesons decay photons is subtracted statistically to extract the χE distributions of isolated photon–hadron and isolated π0 -hadron correlations.At high pT, direct photons produced in Compton and annihilation QCD leading order processes are associated to a jet in the opposite direction. Such processes are tagged experimentally by identifying leading isolated photons and their correlated associated hadrons in the opposite azimuthal direction. The jet fragmentation can be estimated from the hadrons and the photon via the imbalance parameter xE. We present the results extracted from gamma-hadron correlations measured by the ALICE experiment in pp collisions at {\sqrt(s)} = 7 TeV. Direct photons are first identified using isolated criteria. Then, the remaining contamination from neutral mesons decay photons is subtracted statistically to extract the xE distributions of isolated photon-hadron and isolated {\pi}^0-hadron correlations.arXiv:1211.6620oai:cds.cern.ch:14967202012-11-29
spellingShingle Particle Physics - Experiment
Arbor, Nicolas
Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment
title Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment
title_full Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment
title_fullStr Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment
title_full_unstemmed Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment
title_short Isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 TeV with the ALICE experiment
title_sort isolated photon-hadron correlations in proton-proton collisions at {\sqrt(s)} = 7 tev with the alice experiment
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.nuclphysa.2013.02.110
http://cds.cern.ch/record/1496720
work_keys_str_mv AT arbornicolas isolatedphotonhadroncorrelationsinprotonprotoncollisionsatsqrts7tevwiththealiceexperiment

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