Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-02-19
Nucl.Phys. A696 (2001) 788-832
Physics
High Energy Physics
High Energy Physics - Phenomenology
Final version published in Nucl. Phys. A. 40 pages in RevTex with 15 postscript figures
Scientific paper
10.1016/S0375-9474(01)01130-7
Multiple parton scattering and induced parton energy loss is studied in deeply inelastic scattering (DIS) off nuclei. The effect of multiple scattering of a highly off-shell quark and the induced parton energy loss is expressed in terms of the modification to the quark fragmentation functions. We derive such modified quark fragmentation functions and their QCD evolution equations in DIS using generalized factorization of higher twist parton distributions. We consider double-hard, hard-soft parton scattering as well as their interferences in the same framework. The final result, which depends on both the diagonal and off-diagonal twist-four parton distributions in nuclei, demonstrates clearly the Landau-Pomeranchuk-Migdal interference features and predicts a unique nuclear modification of the quark fragmentation functions.
Guo Xiaofeng
Wang Xin-Nian
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