Work

First extraction of interference fragmentation functions from e+e− data

Year: 2012

Type: article

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 ${e}^{+}{e}^{\ensuremath{-}}$ annihilation. A nonzero asymmetry in the correlation of azimuthal orientations of opposite ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ 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 ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ 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.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.85.114023

Authors: Aurore Courtoy, Alessandro Bacchetta, Marco Radici, Andrea Bianconi

Institutions: University of Liège, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, University of Pavia, University of Brescia

Language: Latvian

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Fonds De La Recherche Scientifique - FNRS, Ministero dell’Istruzione, dell’Università e della Ricerca

Awards: Study of Strongly Interacting Matter, La struttura del nucleone: impulso trasverso, spin trasverso e momento angolare orbitale.