Probing the low-x structure of nuclear matter with diffractive hadron production in pA collisions

Details Probing the low-x structure of nuclear matter with diffractive hadron production in pA collisions Probing the low-x structure of nuclear matter with diffractive hadron production in pA collisions

2008-06-12

arxiv.org/abs/0806.2087v1

Phys.Rev.C78:024905,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 7 figures

Scientific paper

10.1103/PhysRevC.78.024905

We argue that hadron production in coherent diffraction of proton on a heavy nucleus provides a very sensitive probe of the low-x QCD dynamics. This process probes the BFKL dynamics in proton and the non-linear gluon evolution in nucleus. We calculate the diffractive hadron production cross sections in the RHIC and LHC kinematic regions. To study the nuclear effects we introduce the diffractive nuclear modification factor. We show that unlike the nuclear modification factor for inclusive hadron production that has a very interesting dynamics at RHIC but is expected to be almost completely saturated at the LHC, the nuclear modification factor for diffractive production exhibits a non-trivial behavior both at RHIC and LHC.

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