Speaker
Christian Sturm
(Brookhaven National Laboratory)
Description
Quark masses are fundamental parameters of QCD. Their accurate
determination is thus a mandatory task. Light quark masses can be
determined non-perturbatively through lattice simulations in a given
renormalization scheme, e.g. a momentum subtraction scheme. The MSbar
scheme is not directly amenable in lattice simulations since it is
closely related to dimensional regularization. To obtain results for the
light quark masses in MSbar scheme conversion factors are needed, which
transform the quark mass from a momentum subtraction scheme to MSbar
scheme. Such conversion factors can be computed in continuum
perturbation theory. The concepts and framework of a new improved
scheme as well as the perturbative computation of the conversion is
discussed in the talk. The work is based on the results of
0901.2599 [hep-ph].
Author
Christian Sturm
(Brookhaven National Laboratory)
Co-authors
A. Soni
(Brookhaven National Laboratory)
C.T.C. Sachrajda
(University of Southampton)
N.H. Christ
(Columbia University)
T. Izubuchi
(Brookhaven National Laboratory)
Y. Aoki
(RIKEN-BNL Research Center, BNL)
