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HK: Physik der Hadronen und Kerne

HK 17: Electromagnetic and Hadronic Probes II

HK 17.7: Vortrag

Dienstag, 9. März 2004, 17:30–17:45, B

Hadron multiplicities and fragmentation functions at HERMES — •Achim Hillenbrand — University of Erlangen-Nürnberg, Physikalisches Institut II, Erwin-Rommel-Str. 1, 91058 Erlangen

Charge separated hadron multiplicities for Pions, Kaons and Protons have been extracted from the Proton and Deuterium data of the year 2000. These multiplicities formed the basis for the optimization of the LUND fragmentation model to HERMES energies. To enable the iterative fitting of the Monte Carlo data to the experimental multiplicities, a program was developed that allowed to take into account the detector smearing effects on a statistical basis without the time consuming tracking by using a detector model.

The experimental multiplicities have been corrected for influences due to the HERMES acceptance and radiative effects. The results form the basis for the extraction of fragmentation functions. The latest results are presented.

This work was supported by the BMBF (06 ER 928I, 06 ER 125I).