Bochum 2018 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 30: Hadron Structure and Spectroscopy V
HK 30.1: Group Report
Wednesday, February 28, 2018, 14:00–14:30, HZO 50
Feasibility studies for the measurement of time-like, electromagnetic form factors of the proton at PANDA-FAIR — Samer Ahmed1, Luigi Capozza1, Alaa Dbeyssi1, Phillip Grasemann1, Frank Maas1,2, Oliver Noll1, David Rodriguez Pineiro1,2, Sahra Wolff1, Manuel Zambrana1,2, and •Iris Zimmermann1 for the PANDA collaboration — 1Helmholtz-Institut Mainz — 2GSI Darmstadt
One of the main goals of the future PANDA experiment at FAIR (Darmstadt, Germany) is the investigation of the proton structure. Electromagnetic form factors (FF’s) are fundamental quantities which parameterize the electric and magnetic structure of hadrons. In the time-like region, proton FF’s can be accessed experimentally in pp → l+l− (l = e, µ) annihilation processes, assuming that the interaction takes place through the exchange of one virtual photon. The expected statistical precision for the measurement of time-like electromagnetic proton form factors with PANDA was investigated in the framework of the PANDARoot software for detector simulation and event reconstruction for both muon and electron channels. These studies investigated the possibility to achieve an optimal signal-background separation and sufficient background suppression of the relevant background channels. Different methods have been used to generate and analyse the processes of interest. The results show, that time-like electromagnetic proton form factors can be measured at PANDA with high statistical accuracy over a large kinematical region.