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Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Theorie

HK 21.6: Talk

Tuesday, March 11, 2008, 10:00–10:15, 2F

Chiral extrapolations of nucleon form factors — •Tobias Gail und Thomas Hemmert — Institut für Theoretische Physik T39, Physik-Department der TU München

We present a calculation of the isovector and isoscalar form factors of the nucleon utilizing the methods of covariant Chiral Perturbation Theory at next-to-leading one-loop order and a consistent renormalization program. We discuss the quark-mass dependence of the anomalous magnetic moments and the radii as well as the full momentum-transfer and quark-mass dependence of the form factors. Furthermore, real chiral extrapolations of lattice results for these observables are performed, i.e. we give predictions for those observables from the combined lattice plus ChPT approach including an analysis of systematic and statistical errors.

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