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HK: Physik der Hadronen und Kerne

HK 37: Elektromagnetische und Hadronische Proben

HK 37.1: Talk

Wednesday, March 9, 2005, 14:00–14:15, TU MA001

Electromagnetic form factors of the nucleon in the perturbative chiral quark model — •Kem Pumsa-ard, V.E. Lyubovitskij, Th. Gutsche, and Amand Faessler — Institut für Theoretische Physik, Universität Tübingen, D-72076 Tübingen, Germany

We study the electromagnetic form factors of the nucleon in a manifestly Lorentz invariant quark model. In addition, we also include chiral corrections up to fourth order on the quark level as deduced from relativistic baryon chiral perturbation theory. The current approach is an improved version of our previous model, the perturbative chiral quark model (PCQM) [1].

[1] V. E. Lyubovitskij, Th. Gutsche and A. Faessler, Phys. Rev. C 64 (2001) 065203; V. E. Lyubovitskij et al., Phys. Rev. C 65 (2002) 025202; C 66 (2002) 055204; C 68 (2003) 015205; Phys. Lett. B 520 (2001) 204