Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-12-07
Phys.Rev.D81:054001,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 11 figures
Scientific paper
10.1103/PhysRevD.81.054001
We perform a detailed phenomenological analysis of how well hadronization in nuclear environments can be described in terms of effective fragmentation functions. The medium modified fragmentation functions are assumed to factorize from the partonic scattering cross sections and evolve in the hard scale in the same way as the standard or vacuum fragmentation functions. Based on precise data on semi-inclusive deep-inelastic scattering off nuclei and hadron production in deuteron-gold collisions, we extract sets of effective fragmentation functions for pions and kaons at NLO accuracy. The obtained sets provide a rather accurate description of the kinematical dependence of the analyzed cross sections and are found to differ significantly from standard fragmentation functions both in shape and magnitude. Our results support the notion of factorization and universality in the studied nuclear environments, at least in an effective way and within the precision of the available data.
Sassot Rodolfo
Stratmann Marco
Zurita Pia
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