A method to extract B-physics parameters (b-quark mass and f(B), f(Bs) decay constants) from currently available lattice data is presented and tested. The approach is based on the idea of constructing appropriate ratios of heavy-light meson masses and decay constants, respectively, possessing a precisely known static limit, and evaluating them at various pairs of heavy quark masses around the charm. Via a smooth interpolation in the heavy quark mass from the easily accessible charm region to the asymptotic point, B-physics parameters are computed with a few percent (statistical + systematic) error using recently produced N(f) - 2 maximally twisted Wilson fermions data.
Blossier, B., Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., Lubicz, V., et al. (2010). A proposal for B-physics on current lattices. JOURNAL OF HIGH ENERGY PHYSICS, 04(4), 049 [10.1007/JHEP04(2010)049].
A proposal for B-physics on current lattices
LUBICZ, Vittorio;TARANTINO, CECILIA;
2010-01-01
Abstract
A method to extract B-physics parameters (b-quark mass and f(B), f(Bs) decay constants) from currently available lattice data is presented and tested. The approach is based on the idea of constructing appropriate ratios of heavy-light meson masses and decay constants, respectively, possessing a precisely known static limit, and evaluating them at various pairs of heavy quark masses around the charm. Via a smooth interpolation in the heavy quark mass from the easily accessible charm region to the asymptotic point, B-physics parameters are computed with a few percent (statistical + systematic) error using recently produced N(f) - 2 maximally twisted Wilson fermions data.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
