On the behaviour of R(pA) at high energy

Details On the behaviour of R(pA) at high energy On the behaviour of R(pA) at high energy

2007-08-31

arxiv.org/abs/0708.4322v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures: To appear in the proceedings of 12th International Conference on Elastic and Diffractive Scattering; Forwa

Scientific paper

We discuss the behaviour of R(pA), the ratio of the unintegrated gluon distribution of a nucleus over the unintegrated gluon distribution of a proton scaled up by A^{1/3}, at high energy and fixed coupling. We show that R(pA) exhibits a rising gluon shadowing with growing rapidity, approaching 1/A^{1/3} at asymptotic rapidity, which means total gluon shadowing due to gluon number fluctuations or Pomeron loops.

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