Quark-quark Double Scattering and Modified (Anti-)Quark Fragmentation Functions in Nuclei

Details Quark-quark Double Scattering and Modified (Anti-)Quark Fragmentation Functions in Nuclei Quark-quark Double Scattering and Modified (Anti-)Quark Fragmentation Functions in Nuclei

2007-03-05

arxiv.org/abs/nucl-th/0703014v1

Nucl.Phys.A783:551-554,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure, talk at "Hard Probes 2006", Asilomar, California, USA, June 9-16, 2006

Scientific paper

10.1016/j.nuclphysa.2006.11.114

Quark-quark double scattering in eA DIS and its contribution to quark and anti-quark fragmentation functions are investigated with the generalized factorization of the relevant twist-four processes in pQCD. It is shown that the resulting modifications to quark and anti-quark fragmentation functions are different. While the numerical size of these effects cannot be determined from pQCD, the structure of our result leads to a number of qualitative predictions for the relative size of the effect for different hadrons. These qualitative predictions agree with the multiplicity ratios for positive and negative hadrons as observed by HERMES.

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