Darmstadt 2016 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Postersession
HK 45.26: Poster
Wednesday, March 16, 2016, 18:30–20:30, S1/05 22-24
Measurement of Time-Like Baryon Electro-Magnetic Form Factors in BESIII — •Cristina Morales Morales1, Samer Ali Nasher Ahmed1,2, Alaa Dbeyssi1, Dexu Lin1,2, Frank Maas1,2,3, Christoph Rosner1,2, and Yadi Wang1,2 for the BESIII collaboration — 1Helmholtz-Institut Mainz, 55128 Mainz — 2Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — 3PRISMA Cluster of Excellence, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
BEPCII is a symmetric electron-positron collider located in Beijing running at center-of-mass energies between 2.0 and 4.6 GeV. This energy range allows BESIII experiment to measure baryon form factors both from direct electron-positron annihilation and from initial state radiation processes. We present results on direct electron-positron annihilation into proton anti-proton and preliminary results on direct electron-positron annihilation into lambda anti-lambda based on data collected by BESIII in 2011 and 2012. Finally, expectations on the measurement of nucleon and hyperon electro-magnetic form factors from the BESIII high luminosity energy scan in 2015 and from initial state radiation processes at different center-of-mass energies are also shown.