Evolution of the parton dihadron fragmentation functions

Abstract

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.

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

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• Jet Structure of Baryon Excess in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Probing jet properties via two particle correlation method
• Dihadron fragmentation functions and high Pt hadron-hadron correlations

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