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)