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 \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.
Cite
@article{arxiv.1202.0323,
title = {First extraction of Interference Fragmentation Functions from e+e- data},
author = {A. Courtoy and A. Bacchetta and M. Radici and A. Bianconi},
journal= {arXiv preprint arXiv:1202.0323},
year = {2013}
}
Comments
17 pages, 7 (multiple) figures, 15 tables, RevTeX format; refined version of the fit, conclusions unchanged; added reference