Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 9: Hadron Structure and Spectroscopy I
HK 9.3: Vortrag
Montag, 28. März 2022, 14:45–15:00, HK-H8
Feasibility study of the reaction p p → e+ e− π0 with the PANDA experiment at FAIR — •Alaa Dbeyssi1, Frank Maas1,2,3, Luigi Capozza1, Oliver Noll1, David Rodriguez Pineiro1, Christoph Rosner1, Sahra Wolff1, Alexander Greiner1, Julian Moik1, Samet Katilmis1, and Dong Liu1 for the PANDA collaboration — 1Helmholtz-Institut Mainz, Germany — 2Institute of Nuclear Physics, Johannes Gutenberg University, Mainz, Germany — 3Prisma Cluster of Excellence, Mainz, Germany
The feasibility of measuring the reaction p p → e+ e− π0 with the PANDA detector is investigated within the PANDARoot simulation framework. At high center of mass energy and high invariant mass squared of the lepton pair, a collinear factorisation description of the reaction amplitude, based on nucleon-to-meson transition distribution amplitudes, is predicted in the near forward and near backward regimes. At low lepton invariant mass squared, a parametrisation that assumes the exchange of dominant baryon Regge trajectories is suggested. Such a parametrisation will allow us to study the proton electromagnetic form factors in the so called "unphysical region". The collinear factorisation theorem for the nucleon-to-meson transition distribution amplitudes has not yet been proven experimentally. In addition, no data exist so far on the proton electromagnetic form factors in the unphysical region. The capability of PANDA to measure the differential cross sections for the reaction p p → e+ e− π0 and perform validity tests of the predicted QCD models will be shown in this talk.