Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 54: Hadronenstruktur und -spektroskopie
HK 54.7: Vortrag
Freitag, 23. März 2012, 12:45–13:00, RW 1
Monte Carlo event generators for Panda — •Manuel Zambrana — Institut fuer Kernphysik, Mainz University and Helmholtz Institut Mainz, Mainz, Germany
Lepton production in proton-antiproton annihilation is one of the main channels to access the proton form factors in the timelike region. The development of Monte Carlo event generators for pp → e+e− is described. The used cross section results from a leading order calculation, the so called one-photon exchanged approximation. In addition, a Monte Carlo event generator for the main background channel, i.e. pp → π+π− is also described. In this case, the parametrisation of the cross section comes from a polynomial fit and from a Regge description in the low and high energy regime, respectively. Preliminary results on the channel pp → e+e−π0, which opens the possibility of accessing the unphysical region q2<4M2, are discussed.