Particle Physics Seminar
"Accessing Unpolarized and Polarized Fragmentation Functions at Belle"
Presented by Martin Leitgab, University of Illinois at Urbana-Champaign
Thursday, August 8, 2013, 3 pm
Small Seminar Room, Bldg. 510
Hosted by: David Jaffe
Fragmentation functions (FFs) describe the formation of final-state particles in high-energy particle collisions and are directly related to the intriguing Quantum Chromodynamics (QCD) phenomenon of confinement. Precise knowledge of these functions is a key ingredient in accessing quantities such as the nucleon spin structure in semi-inclusive deep inelastic scattering and proton-proton collisions. However, FFs can currently not be determined from first principles QCD and have to be extracted from experimentally measured hadron production data. The Belle experiment at KEK, Japan, provides a large data sample and excellent particle identification capabilities for high precision measurements which allow first-time or more precise extractions of FFs. Final results of a spin-independent hadron production measurement for identified pions and kaons will be presented and completed spin-dependent measurements will be reviewed.