Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Hadron Structure and Spectroscopy 1
HK 8.4: Vortrag
Montag, 23. März 2015, 15:30–15:45, T/SR19
Feasibility studies of time-like proton electromagnetic form factors at PANDA-FAIR — •Alaa Dbeyssi1, Luigi Capozza1, Malte Deiseroth1, Bertold Froehlich1, Dmitry Khaneft1, Frank Maas1,2,3, Dominique Marchand4, Maria Carmen Mora Espi1, Oliver Noll1, David Rodriguez Pineiro1, Egle Tomasi-Gustafsson4, Roserio Valente1, Ying Wang4, Manuel Zambrana1, and Iris Zimmerman1 for the PANDA collaboration — 1Helmholtz-Institut Mainz, Mainz, Germany — 2Institute of Nuclear Physics, Mainz, Germany — 3PRISMA Cluster of Excellence, Mainz, Germany — 4Institut de Physique Nucléaire, Orsay, France
Electromagnetic form factors are fundamental quantities which describe the intrinsic electric and magnetic distributions of hadrons. Time-like proton form factors are experimentally accessible through the annihilation processes p +p ↔ e+ + e−. Their measurement in the time-like region had been limited by the low statistics achieved by the experiments. This contribution reports on the results of Monte Carlo simulations for future measurements of electromagnetic proton form factors at PANDA (antiProton ANnihilation at DArmstadt). In frame of the PANDARoot software, the statistical precision at which the proton form factors will be determined is estimated. The signal (p + p → e+ + e−) identification and the suppression of the main background process (p + p → π+ + π−) are studied. Different methods have been used and/or developed to generate and analyse the processes of interest. The results show that time-like proton form factors will be measured at PANDA with unprecedented statistical accuracy.