Gluon saturation effects at forward rapidities at LHC in pp collisions

Details Gluon saturation effects at forward rapidities at LHC in pp collisions Gluon saturation effects at forward rapidities at LHC in pp collisions

2010-01-28

arxiv.org/abs/1001.5266v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 6 figures, Contributed to "Lepton-Photon 2009 (LP09)", Hamburg, Germany

Scientific paper

We investigate hadrons and direct photon production in pp collisions at the LHC energy within the color-dipole approach. We show that greatest sensitivity to gluon saturation effects is reached at very forward rapidities in pp collisions at LHC (\sqrt{s}=14 TeV). The discrepancies among various saturation models (fitted to HERA data) results can be about a factor of 2-3 at forward rapidities. We found that the ratio of direct-photon to pion production can be about 20-10 at forward rapidities \eta=7-8. Therefore, direct photon production at forward rapidities should provide a rather clean probe as the background from radiative hadronic decays is significantly suppressed.

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