First extraction of Interference Fragmentation Functions from e+e- data

Abstract

We report on the first extraction of interference fragmentation functions from the semi-inclusive production of two hadron pairs in back-to-back jets in e+e- annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite π+π- pairs is related to the transverse polarization of fragmenting quarks through a significant polarized dihadron fragmentation function. Extraction of the latter requires the knowledge of its unpolarized counterpart, the probability density for a quark to fragment in a π+π- pair. Since data for the unpolarized cross section are missing, we extract the unpolarized dihadron fragmentation function from a Monte Carlo simulation of the cross section.

17 pages, 7 (multiple) figures, 15 tables, RevTeX format; refined version of the fit, conclusions unchanged; added reference

References in corpus (8)

• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• Observation of transverse polarization asymmetries of charged pion pairs in e+e- annihilation near sqrt s=10.58 GeV
• First glances at the transversity parton distribution through dihadron fragmentation functions
• Modeling dihadron fragmentation functions
• Evolution equations for extended dihadron fragmentation functions
• Asymmetries involving dihadron fragmentation functions: from DIS to e+e- annihilation
• Dihadron fragmentation functions for large invariant mass
• Dihadron fragmentation functions and their relevance for transverse spin studies

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