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

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

2012-02-01

arxiv.org/abs/1202.0323v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 7 (multiple) figures, 15 tables, RevTeX format

Scientific paper

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 \pi+\pi- 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 \pi+\pi- 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.

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