Evolution of the parton dihadron fragmentation functions

Details Evolution of the parton dihadron fragmentation functions Evolution of the parton dihadron fragmentation functions

2004-11-12

arxiv.org/abs/hep-ph/0411174v2

Phys.Rev. D72 (2005) 034007

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 column revtex, 12 figures One table added

Scientific paper

10.1103/PhysRevD.72.034007

Quark and gluon parton dihadron fragmentation functions and their evolution are studied in the process of e+e- annihilation. We provide definitions of such dihadron fragmentation functions in terms of parton matrix elements and derive the momentum sum rules and their connection to single hadron fragmentation functions. We parameterize results from the Lund Monte Carlo model JETSET as the initial conditions for the parton dihadron fragmentation functions at the scale Q_0^2=2 GeV^2. The evolution equations for the quark and gluon fragmentation functions are solved numerically and the results at different higher scales Q^2 agree well with JETSET results. The importance of the input from the single fragmentation functions is pointed out.

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