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HK: Fachverband Physik der Hadronen und Kerne

HK 77: Hadronenstruktur und -spektroskopie

HK 77.8: Vortrag

Donnerstag, 7. März 2013, 18:45–19:00, HSZ-304

A Geant4 based MC simulation for the COMPASS-II experiment at CERN — •Tobias Szameitat, Steffen Bauer, Horst Fischer, Florian Herrmann, Kay Königsmann, Michael Kunz, Tobias Kunz, Pasquale Malm, Christopher Regali, Robert Schäfer, Katharina Schmidt, Stefan Sirtl, and Johannes ter Wolbeek — for the COMPASS collaboration, Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

A dynamical and geometrical picture of the nucleon is provided by the theoretical framework of Generalized Parton Distributions (GPDs). Experimentally the GPDs can be accessed in exclusive measurements such as Hard Exclusive Meson Production and Deeply Virtual Compton Scattering. Upgrades of the COMPASS-II setup performed through 2012 allow for measurements of such exclusive reactions. The COMPASS-II experiment at CERN is a fixed-target experiment for the investigation of the spin structure of the nucleon and for hadron spectroscopy. The experiment is built as a multi-purpose two stage spectrometer. For a detailed understanding of the spectrometer acceptance a new Geant4 based simulation tool has been developed. We report on the implementation of the different detectors in Geant4 and key-performance figures. Supported by BMBF, DFG and EU FP7 (Grant Agreement 283286).