Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 1: Hadronenstruktur und -spektroskopie

HK 1.4: Talk

Monday, March 19, 2012, 15:00–15:15, RW 1

Nucleon form factors in Lattice QCD — •Benjamin Jäger — Institut für Kernphysik und Helmholtz Institut Mainz, Mainz, Germany

The electromagnetic form factors of the nucleon, given by the Pauli- and Dirac form factor, allow to obtain information about the structure of a nucleon. Fundamental quantities, like the charge distribution within the nucleon, can be derived from these form factors.

Lattice QCD delivers an ab initio method to treat the non-perturbative region of QCD. We use non-perturbatively O(a) improved Wilson fermions with two dynamical quarks to compute the relevant matrix elements. We present some preliminary results for the vector form factors, including a preliminary study of systematic uncertainties of the lattice approach like volume and cutoff effects.