München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 5: Theorie

HK 5.5: Vortrag

Montag, 20. März 2006, 15:00–15:15, B

Utilizing covariant BChPT for chiral extrapolations — •Tobias A. Gail and Thomas R. Hemmert — Institut für theoretische Physik T39, Physik Department der TU-München

We discuss the use of covariant BChPT for chiral extrapolations. We explain the difference between MS and IR [1] regularization and use a new variant of IR [2] to connect the ChEFT results both to dispersion theory and to nonrelativistic approaches like HBChPT.
We use all three methods to calculate the quark mass dependence of the nucleon mass and of the nucleon anomalous magnetic moment at order p⁴ in covariant BChPT and apply our results to chiral extrapolations of lattice data [3],[4] for these quantities.
Work supported by BMBF and I3HP.

[1] T. Becher and H. Leutwyler, Eur.Phys.J C9:643 (1999).

[2] T. Gail and T. Hemmert, forthcoming.

[3] M. Göckeler et al. (QCDSF Collaboration), Phys.Rev. D71:034508 (2005).

[4] A. Ali Khan et al. (QCDSF-UKQCD Collaboration), Nucl.Phys. B689:175 (2004).