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16–20 Apr 2007
Holiday Inn Munich City Centre & Gasteig Conference Center
Europe/Zurich timezone

Evolution equations for dihadron fragmentation functions

19 Apr 2007, 11:50
20m
Forum 7 (Holiday Inn Munich City Centre & Gasteig Conference Center)

Forum 7

Holiday Inn Munich City Centre & Gasteig Conference Center

Hochstrasse 3 81669 Munich Germany
Spin Physics Spin Physics

Speaker

Marco Radici (INFN - Sezione Pavia)

Description

We consider dihadron fragmentation functions, that describe the fragmentation of a parton in two (unpolarized) hadrons. Using Jet calculus techniques, we develop evolution equations when these functions are explicitly depending upon the invariant mass of the produced hadron pair, the socalled extended dihadron fragmentation functions. We connect our results to the integrated dihadron fragmentation functions and we establish a formal correspondence with the (extended) fracture functions in the space-like domain. Our results can be used in the analysis of (spin) asymmetries in the azimuthal distribution of final pion pairs, particularly for semi-inclusive deep-inelastic scattering on transversely polarized targets, where extended dihadron fragmentation functions represent a convenient analyzing power to extract the quark transversity distribution.

Primary author

Marco Radici (INFN - Sezione Pavia)

Presentation materials