Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-07-12
Phys.Lett.B697:333-338,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 figures. Extended version to be published in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2011.02.018
Saturation of small-x gluons in a nucleus, which has the form of transverse momentum broadening of projectile gluons in pA collisions in the nuclear rest frame, leads to a modification of the parton distribution functions in the beam compared with pp collisions. The DGLAP driven gluon distribution turns out to be suppressed at large x, but significantly enhanced at x<<1. This is a high twist effect. In the case of nucleus-nucleus collisions all participating nucleons on both sides get enriched in gluon density at small x, which leads to a further boosting of the saturation scale. We derive reciprocity equations for the saturation scales corresponding to a collision of two nuclei. The solution of these equations for central collisions of two heavy nuclei demonstrate a significant, up to several times, enhancement of Q_{sA}^2, in AA compared with pA collisions.
Kopeliovich Boris Z.
Pirner Hans-Juergen
Potashnikova I. K.
Schmidt Ivan
No associations
LandOfFree
Mutual boosting of the saturation scales in colliding nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mutual boosting of the saturation scales in colliding nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mutual boosting of the saturation scales in colliding nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-696508