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⁺ e⁻ → pp cross section via initial state radiation at BESIII — •Alaa Dbeyssi¹, Samer Ahmed¹, Paul Larin¹, Dexu Lin¹, Frank Maas^1,2,3, 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⁺ e⁻ → p 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⁺ e⁻ → p p cross section and the proton form factors in the time-like region are presented.