How Protons Shatter Colored Glass

Abstract

We consider the implications of the Color Glass Condensate for the central region of p+A collisions. We compute the k_t distribution of radiated gluons and their rapidity distribution dN/dy analytically, both in the perturbative regime and in the region between the two saturation momenta. We find an analytic expression for the number of produced gluons which is valid when the saturation momentum of the proton is much less than that of the nucleus. We discuss the scaling of the produced multiplicity with A. We show that the slope of the rapidity density dN/dy provides an experimental measure for the renormalization-group evolution of the color charge density of the Color Glass Condensate (CGC). We also argue that these results are easily generalized to collisions of nuclei of different A at central rapidity, or with the same A but at a rapidity far from the central region.

9 pages, RevTex, 3 Figures; some typos corrected, the scaling of <kt>^2 with dN/dy is derived

References in corpus (4)

• The Renormalization Group Equation for the Color Glass Condensate
• Hadron production in nuclear collisions at RHIC and high density QCD
• Saturation and Universality in QCD at small x
• Intrinsic Broadening of the Transverse Momentum Spectra in Ultrarelativistic Heavy-Ion Collisions?

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