Fragmentation in e+e- collisions
David T. Kettler, THOMAS A. TRAINOR · 2007
We analyze the energy scale dependence of fragmentation functions from e + -e -collisions using conventional momentum measures x p and ξ p and rapidity y.We find that replotting fragmenta- tion 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 p t in heavy ion collisions at RHIC. Correlations and Fluctuations in Relativistic Nuclear Collisions