文章基本信息

标题：Fragmentation in e+e- collisions
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作者：D. Kettler ; T.A. Trainor
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We analyze the energy scale dependence of fragmentation functions from e+-e− collisions using conventional momentum measures xp and xp and rapidity y. We find that replotting fragmentation functions on normalized rapidity u results in a compact form precisely represented by the beta distribution, its two parameters varying slowly and simply with parton energy scale Q. The resulting parameterization enables extrapolation of fragmentation functions to small Q in order to describe fragment distributions at low transverse momentum pt in heavy ion collisions at RHIC.