Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Hadron Structure and Spectroscopy 10

HK 47.1: Vortrag

Mittwoch, 25. März 2015, 14:30–14:45, T/SR25

Extraction of Quark Fragmentation Functions in Leading Order at COMPASS — •Nicolas du Fresne von Hohenesche — For the COMPASS collaboration— Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Johann-Joachim-Becher-Weg 45, 55099 Mainz

Quark fragmentation functions (FF) D_q^h(z,Q²) describe final-state hadronisation of quarks q into hadrons h. The FFs can be extracted from hadron multiplicities produced in semi-inclusive deep inelastic scattering using a χ² fit. The COMPASS collaboration has recently measured charged hadron multiplicities for identified pions and kaons using a 160 GeV/c muon beam impinging on an iso-scalar target. The data cover a large kinematical range and provide an important input for global QCD analyses of world data at NLO, aiming at the determination of FFs in particular in the strange quark sector. The newest results from COMPASS on pion multiplicities and LO fragmentation functions will be presented.
Supported by BMBF