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T: Fachverband Teilchenphysik
T 23: Gittereichtheorie I
T 23.8: Talk
Monday, March 28, 2011, 18:30–18:45, 30.23: 10-1
Chiral extrapolation of nucleon wave function normalization constants — •Philipp Wein, Andreas Schäfer, and Thomas Hemmert — Universität Regensburg
In the framework of two-flavor covariant baryon chiral perturbation theory, we have expressed the Chernyak-Zhitnitsky, Ioffe and Dosch currents in terms of chiral fields to provide leading one-loop extrapolation formulae for the respective leading and next-to-leading twist normalization constants fN, λ1 and λ2. The occurring low energy constants are fitted to data obtained from recent lattice QCD simulations in order to extract the values at the physical point. This work was supported by BMBF and DFG.