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).