Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-07-03
Phys.Rev.D68:094013,2003
Physics
High Energy Physics
High Energy Physics - Phenomenology
32 pages, 8 figures, v2: extended and improved discussion, references added
Scientific paper
10.1103/PhysRevD.68.094013
We review the predictions of the theory of Color Glass Condensate for gluon production cross section in p(d)A collisions. We demonstrate that at moderate energies, when the gluon production cross section can be calculated in the framework of McLerran-Venugopalan model, it has only partonic level Cronin effect in it. At higher energies/rapidities corresponding to smaller values of Bjorken x quantum evolution becomes important. The effect of quantum evolution at higher energies/rapidities is to introduce suppression of high-p_T gluons slightly decreasing the Cronin enhancement. At still higher energies/rapidities quantum evolution leads to suppression of produced gluons at all values of p_T.
Kharzeev Dmitri
Kovchegov Yuri V.
Tuchin Kirill
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