Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 24: Electromagnetic and Hadronic Probes III

HK 24.6: Talk

Wednesday, March 10, 2004, 12:15–12:30, B

Electromagnetic N to Δ transition 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 N to Δ transition in the manifestly Lorentz invariant quark model. This is the improved version of our previous model, the perturbative chiral quark model (PCQM) [1]. The helicity amplitudes and the ratio E2/M1 for this transition are studied. Our results are in good comparison to the experimental data.

[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