Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Postersession
HK 45.45: Poster
Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24
Measurement of ppbar FFs at BESIII — •Yadi Wang1,2, Christoph Rosner1,2, Cristina Morales1, Samer Ali Nasher Ahmed1,2, Alaa Dbeyssi1, Dexu Lin1,2, and Frank Maas1,2,3 for the BESIII collaboration — 1Helmholtz Institute Mainz, 55128 Mainz, Germany — 2Institute for Nuclear Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany — 3PRISMA Cluster of Excellence, Johannes Gutenberg University, Mainz, 55099 Mainz, Germany
The structure of the proton can be understood through the study of its electromagnetic (EM) form factors. Due to the low luminosity achieved up to now, few data exist on the proton form factors in the time-like region and only a very coarse determination of the individual electric and magnetic form factors (or its ratio) has been possible so far. BESIII (Beijing Spectrometer III) at BEPCII (Beijing Electron Positron Collider II) has a better performance in detecting ppbar, nnbar, ΛΛbar and so on. We studied the feasibility of measurement of form factors of proton at BESIII. In 2014 and 2015, BESIII has collected large e+e* scanning data samples with a total luminosity of 525.5 pb*1. With these data samples, the renovation of the status of proton form factors is foreseen.