Dihadron fragmentation functions and high Pt hadron-hadron correlations

Details Dihadron fragmentation functions and high Pt hadron-hadron correlations Dihadron fragmentation functions and high Pt hadron-hadron correlations

2004-04-30

arxiv.org/abs/hep-ph/0404292v1

J.Phys. G30 (2004) S1305-S1308

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 4 pages, 4 figures, talk given at Quark Matter 2004, To appear in J. Phys. G

Scientific paper

10.1088/0954-3899/30/8/114

We propose the formulation of a dihadron fragmentation function in terms of parton matrix elements. Under the collinear factorization approximation and facilitated by the cut-vertex technique, the two hadron inclusive cross section at leading order (LO) in e+ e- annihilation is shown to factorize into a short distance parton cross section and the long distance dihadron fragmentation function. We also derive the DGLAP evolution equation of this function at leading log. The evolution equation for the non-singlet quark fragmentation function is solved numerically with a simple ansatz for the initial condition and results are presented for cases of physical interest.

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