QGP tomography with photon tagged jets in ALICE

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MAO Ya-Xian, Yves Schutz, ZHOU Dai-Cui, Christophe Furget and Gustavo Conesa Balbastre. QGP tomography with photon tagged jets in ALICE[J]. Chinese Physics C, 2010, 34(9): 1491-1493. doi: 10.1088/1674-1137/34/9/081
MAO Ya-Xian, Yves Schutz, ZHOU Dai-Cui, Christophe Furget and Gustavo Conesa Balbastre. QGP tomography with photon tagged jets in ALICE[J]. Chinese Physics C, 2010, 34(9): 1491-1493.  doi: 10.1088/1674-1137/34/9/081 shu
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Received: 2010-03-04
Revised: 1900-01-01
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QGP tomography with photon tagged jets in ALICE

    Corresponding author: MAO Ya-Xian,
  • 1. Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China2 CERN, Geneva 23, Switzerland3 Laboratoire de Physique Subatomique et de Cosmologie, CNRS/IN2P3, Grenoble 38026, France4 Laboratori Nazionali di Frascati, INFN, Frascati, Italy
  • 2.  Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China2 CERN, Geneva 23, Switzerland3 Laboratoire de Physique Subatomique et de Cosmologie, CNRS/IN2P3, Grenoble 38026, France4 Laboratori Nazionali di Frascati, INFN, Frascati, Italy

Abstract: 

γ+jet events provide a tomographic measurement of the medium formed in heavy ion collisions at LHC energies. Tagging events with a well identified high pT direct photon and measuring the correlation distribution of hadrons emitted oppositely to the photon in ALICE, allows us to determine, with a good approximation, both the jet fragmentation function and the back-to-back azimuthal alignment of the direct photon and the jet. Comparing these two observables measured in pp collisions with the ones measured in AA collisions will reveal the modifications of the jet structure induced by the medium formed in AA collisions and consequently will infer the medium properties.

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