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Direct photons at low transverse momentum -- a QGP signal in pp collisions at LHC

Abstract : We predict that direct photon production in pp collisions at 7~TeV will get at least 10 times enhanced compared to the next to leading order pQCD predictions, at low transverse momentum ($\pt$ $\lesssim$ 10~GeV/c), due to the thermal photon emissions from a quark gluon plasma (QGP) formed in high multiplicity events. Thus the enhancement of direct photon production at low $\pt$ can be a QGP signal in pp collisions.
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http://hal.in2p3.fr/in2p3-00564201
Contributor : Dominique Girod <>
Submitted on : Tuesday, February 8, 2011 - 11:36:48 AM
Last modification on : Friday, January 3, 2020 - 4:30:07 PM

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Fu-Ming Liu, Klaus Werner. Direct photons at low transverse momentum -- a QGP signal in pp collisions at LHC. Physical Review Letters, American Physical Society, 2011, 106, pp.242301. ⟨10.1103/PhysRevLett.106.242301⟩. ⟨in2p3-00564201⟩

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