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München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Poster

HK 54.13: Poster

Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium

Measurement of the e+ epp cross section via initial state radiation at BESIII — •Alaa Dbeyssi1, Samer Ahmed1, Paul Larin1, Dexu Lin1, Frank Maas1,2,3, Cristina Morales1, Christoph Rosner1, and Yadi Wang1 for the BESIII collaboration — 1Helmholtz- Institut Mainz, Mainz, Germany — 2Institute of Nuclear Physics, Mainz, Germany — 3PRISMA Cluster of Excellence, Mainz, Germany

This contribution reports on the measurements of the e+ ep p cross section using the initial state radiation technique at the BESIII experiment in Beijing. Two independant analyses with detected and undetected initial state radiation photons have been perfomered. The two analyses are based on data sets, corresponding to an integrated luminosity of 7.4 fb−1, collected at center of mass energies between 3.773 and 4.600 GeV. The results on the measured e+ ep p cross section and the proton form factors in the time-like region are presented.

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