Bochum 2018 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 52: Poster
HK 52.4: Poster
Donnerstag, 1. März 2018, 16:30–18:45, Audimax Foyer
Measurements of Neutron Cross Section and Form Factors using 2015 Scan Data at BESIII — •Samer Ahmed1, Alaa Dbeyssi1, Paul Larin1, Dexu Lin1, Frank Maas1,2,3, Cristina Morales1, Cristoph 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
The neutron structure and dynamics can be understood via the study of its electro- magnetic form factors. In the time-like region few experments had been performed so far, none of them had the possibility to determinate the ratio of the electric and magnetic form factors. Therefore, a large data sample in a wide range of center of mass energies [ 2.0 - 3.08 GeV] has been collected in Beijing Spectrometer III (BESIII) at the Beijing Electron Positron Collider II (BEPCII). With the collected data, it is expected to determine the electric and the magnetic FFs of neutron separately, determine Born cross section with higher precision and therefore enhance the knowledge of neutron structure. In this contribution, we will present our strategy of selecting e+e− → nn signal and the expected precision in the determination of Born cross section and electro-magnetic form factors.