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.
A proposal for B-physics on current lattices / B., Blossier; Martinelli, Guido. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2010:4(2010), pp. 49-72. [10.1007/jhep04(2010)049]
A proposal for B-physics on current lattices
MARTINELLI, Guido
2010
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.
