Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Hadron Structure and Spectroscopy 1
HK 8.5: Vortrag
Montag, 23. März 2015, 15:45–16:00, T/SR19
Feasibility studies for the measurement of the time-like electromagnetic form factors of the proton in reactions of p p → µ+µ− at the PANDA-experiment at FAIR. — •Iris Zimmermann, Alaa Dbeyssi, Dmitry Khaneft, Frank Maas, Manuel Zambrana, Maria Carmen Mora Espi, Cristina Morales Morales, Dexu Lin, Bertold Fröhlich, Luigi Capozza, Oliver Noll, Malte Deiseroth, Samer Ahmed, Heybat Ahmadi, Roserio Valente, and David Rodriguez Pineiro for the PANDA collaboration — Helmholtz-Institut Mainz / GSI Darmstadt
The measurement of the time-like electromagnetic form factors (TL em FF), GE and GM, using reactions of p p → l+l− (l=e,µ) gives access to the structure of the proton. It will be the first time measurement of TL em FF of the proton accessing the muons in the final state. One advantage of using this channel is that radiative corrections due to final state radiation are suppressed by the heavy mass of the muon. Measuring p p → µ+ µ− will also serve as a consistency check of the TL em FF data from p p → e+ e−. Feasibility studies for the individual extraction of GE and GM out of the measured angular distribution are in progress for the muonic channel using the software package PANDARoot. Due to the strong hadronic background, mainly reactions of p p → π+ π−, a very good signal-to-background separation is needed. For the analysis of both signal and background channel different multivariate classification methods are used. The current status of the studies will be presented.