Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 1: Hadronenstruktur und -spektroskopie

HK 1.3: Vortrag

Montag, 19. März 2012, 14:45–15:00, RW 1

New insights on the nucleon form factors — •Ina Lorenz, Hans-Werner Hammer, and Ulf-G. Meißner — Helmholtz-Institut für Strahlen- und Kernphysik und Bethe-Center for Theoretical Physics, Universität Bonn

A dispersion theoretical analysis of the recent electron-proton scattering data from Mainz [1] is presented. The two-pion continuum is considered explicitly. Possible deviations from earlier analyses and their impact on the proton electromagnetic radii are discussed. Our results are confirmed by a continued fraction ansatz. Furthermore, the dependence of the results on the data range is discussed. [2]

[1] J. C. Bernauer et al., Phys. Rev. Lett. 105 (2010) 242001, http://arXiv.org/abs/1007.5076.

[2] I. Lorenz, Master thesis, in preparation.