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HK: Fachverband Physik der Hadronen und Kerne
HK 1: Hadronenstruktur und -spektroskopie
HK 1.2: Vortrag
Montag, 19. März 2012, 14:30–14:45, RW 1
Measurement of hadronic electromagnetic form factors in BESIII — •Cristina Morales Morales — Helmholtz Institute Mainz, SB1, Johann-Joachim-Becher-Weg 36, 55128 Mainz
The feasibility of a measurement of the electric and magnetic nucleon form factors through radiative return in different e+e− colliders has been studied. In particular, the conditions of the BABAR and BESIII experiments have been reproduced and compared. The estimates presented here are based on the integrated luminosity of 10 fb−1 which will be collected at √s = 3.77 GeV by BESIII in the coming years and the luminosity of 232 fb−1 at √s = 10.6 GeV published by BABAR. The analysis is based on an extension of the generator PHOKHARA 7.0 including the nucleon-antinucleon final states in the presence of initial state radiation including NLO, and other hadronic channels like e+e− → ΛΛγ up to Born level. The analysis of the angular distribution of e+e− → NNγ allows us to extract the time-like electromagnetic form factors of nucleons and other hadrons and the expected resolution of such measurements in BESIII. In particular the cases of neutrons, protons and lambdas in the final state are presented here, with emphasis in the proton case.