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

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

2011-02-05

arxiv.org/abs/1102.1052v2

Phys.Rev.Lett.106:242301,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.106.242301

We investigate photon production in a scenario of quark-gluon plasma formation in proton-proton scattering at 7 TeV. It is shown that thermal photon yields increase quadratically with the charged particle multiplicity. This gives an enhanced weight to high multiplicity events, and leads to an important photon production even in minimum bias events, where the thermal photons largely dominate over the prompt ones at transverse momentum values smaller than 10 GeV/c.

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