First glances at the transversity parton distribution through dihadron fragmentation functions

• Published in: Physical review letters Vol. 107; no. 1; p. 012001
• Main Authors: Bacchetta, Alessandro, Courtoy, Aurore, Radici, Marco
• Format: Journal Article Web Resource
• Language: English
• Published: United States American Physical Society 01-07-2011
• Subjects: BOSONS; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DEEP INELASTIC SCATTERING; DISTRIBUTION; ELECTRON-POSITRON INTERACTIONS; ELEMENTARY PARTICLES; FACTORIZATION; FRAGMENTATION; Fragmentation functions; HADRONS; INELASTIC SCATTERING; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; MESONS; PAIR PRODUCTION; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; Parton distributions; Physical, chemical, mathematical & earth Sciences; Physics; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Physique; Physique, chimie, mathématiques & sciences de la terre; PIONS; POLARIZED TARGETS; Positron annihilation spectroscopy; Positrons; PSEUDOSCALAR MESONS; SCATTERING; TARGETS; Transversity
• ISSN: 0031-9007; 1079-7114; 1079-7114
• DOI: 10.1103/physrevlett.107.012001

We present first observations of the transversity parton distribution based on an analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets. The extraction of transversity relies on the knowledge of dihadron fragmentation functions, which we take from electron-positron annihilation measurements. This is the first attempt to determine the transversity distribution in the framework of collinear factorization.