Multiple parton interactions and forward double pion production in pp and dA scattering
Abstract
We estimate the contributions by double-parton interactions to the cross sections for pp->pi^0 pi^0 X and dA->pi^0 pi^0 X at RHIC. We find that such contributions become important at large forward rapidities of the produced pions. This is in particular the case for dA scattering, where they strongly enhance the azimuthal-angular independent "pedestal" component of the cross section, providing a natural explanation of this feature of the RHIC dA data. We argue that the discussed processes open a window to studies of double quark distributions in nucleons. We also briefly address the roles of shadowing and energy loss in dA scattering, which we show to affect the double-inclusive pion cross section much more strongly than the single-inclusive one. We discuss the implications of our results for the interpretation of pion azimuthal correlations.
Keywords
Cite
@article{arxiv.1009.6123,
title = {Multiple parton interactions and forward double pion production in pp and dA scattering},
author = {Mark Strikman and Werner Vogelsang},
journal= {arXiv preprint arXiv:1009.6123},
year = {2015}
}
Comments
24 pages, 14 figures. Some discussion added, one figure improved. Version to appear in Phys. Rev. D