Gießen 2007 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Theorie

HK 37.2: Talk

Wednesday, March 14, 2007, 17:15–17:30, C

Time Dependent Hadronization via HERMES and EMC Data Consistency — •Kai Gallmeister and Ulrich Mosel — Institut für Theoretische Physik, Universität Giessen, Germany

Using QCD-inspired time dependent cross sections for pre-hadrons we provide a combined analysis of available experimental data on hadron attenuation in DIS off nuclei as measured by HERMES with 12 and 27GeV and by EMC with 100 and 280GeV lepton beam energies. We extract the complete four-dimensional evolution of the pre-hadrons using the JETSET-part of PYTHIA. We find a remarkable sensitivity of nuclear attenuation data to the details of the time-evolution of cross sections. Only cross sections evolving linearly in time describe the available data in a wide kinematical regime. Predictions for experimental conditions at JLAB (5 and 12GeV beam energies) are included.

Work supported by BMBF.