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HK: Fachverband Physik der Hadronen und Kerne

HK 65: Hadronenstruktur und -spektroskopie

HK 65.6: Vortrag

Donnerstag, 7. März 2013, 15:30–15:45, HSZ-304

The pp→ l⁺l⁻ (l=e,µ or τ) and pp→ π⁺π⁻ cross section — •Manuel Zambrana — Institut fuer Kernphysik, Johannes Gutenberg Universitaet Mainz, Germany

We describe the differential cross section for the processes p p → l⁺l⁻, with l=e,µ or τ, and p p → π⁺π⁻, when both the proton target and the antiproton beam are unpolarized. For lepton production, the cross section is a leading order calculation with a massive lepton in the final state. For pion production, the parametrization of the cross section in the low energy regime is based on a Legendre polynomial fit to data from the (antiproton beam) CERN 28 GeV proton synchroton, whereas in the high energy regime the recent predictions by J. van de Wiele and S. Ong based on a Regge Theory approach were used. A public C++ code to perform integration of both the lepton and pion cross section in a user-defined kinematic region is also described. This code is a useful tool for simulation studies with PANDA at FAIR.