Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Postersession

HK 45.26: Poster

Mittwoch, 16. März 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 Ahmed^1,2, Alaa Dbeyssi¹, Dexu Lin^1,2, Frank Maas^1,2,3, Christoph Rosner^1,2, and Yadi Wang^1,2 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.