Direct photons at forward rapidities in high-energy pp collisions

B. Z. Kopeliovich; E. Levin; A. H. Rezaeian; Ivan Schmidt

doi:10.1016/j.physletb.2009.04.023

Direct photons at forward rapidities in high-energy pp collisions

High Energy Physics - Phenomenology 2009-04-22 v3 Nuclear Theory

Authors: B. Z. Kopeliovich , E. Levin , A. H. Rezaeian , Ivan Schmidt

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We investigate direct photon production in pp collisions at the energies of RHIC, CDF and LHC, at different rapidities employing various color-dipole models. The cross section peaks at forward rapidities due to the abelian dynamics of photon radiation. This opens new opportunities for measurement of direct photons at forward rapidities, where the background from radiative hadronic decays is strongly suppressed. Our model calculations show that photon production is sensitive to the gluon saturation effects, and strongly depends on the value of the anomalous dimension.

Keywords

direct photons pp collisions forward rapidity color-dipole models gluon saturation anomalous dimension

Cite

@article{arxiv.0902.4287,
  title  = {Direct photons at forward rapidities in high-energy pp collisions},
  author = {B. Z. Kopeliovich and E. Levin and A. H. Rezaeian and Ivan Schmidt},
  journal= {arXiv preprint arXiv:0902.4287},
  year   = {2009}
}

Comments

7 pages, 8 figures, minor clarifications added. The version to appear in PLB

Direct photons at forward rapidities in high-energy pp collisions

Abstract

Keywords

Cite

Comments

Related papers