QCD evolution equations for high energy partons in nuclear matter
- 1 July 1994
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 50 (1) , 337-357
- https://doi.org/10.1103/physrevd.50.337
Abstract
We derive a generalized form of Altarelli-Parisi equations to describe the time evolution of parton distributions in a nuclear medium. In the framework of the leading logarithmic approximation, we obtain a set of coupled integro-differential equations for the parton distribution functions and equations for the virtuality (‘‘age’’) distribution of partons. In addition to parton branching processes, we take into account fusion and scattering processes that are specific to QCD in medium. Detailed balance between gain and loss terms in the resulting evolution equations correctly accounts for both real and virtual contributions which yields a natural cancellation of infrared divergences.Keywords
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