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arXiv · 0909.3187

A proposal for B-physics on current lattices

ETM collaboration·B. Blossier·P. Dimopoulos·R. Frezzotti·G. Herdoiza·K. Jansen·V. Lubicz·G. Martinelli·C. Michael·G. C. Rossi·A. Shindler·S. Simula·C. Tarantino·C. Urbach
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Abstract

A method to extract B-physics parameters (b-quark mass and fB, fBs 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 Nf=2 maximally twisted Wilson fermions data.

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ETM collaboration, B. Blossier, P. Dimopoulos, R. Frezzotti, G. Herdoiza, K. Jansen, V. Lubicz, G. Martinelli, C. Michael, G. C. Rossi, A. Shindler, S. Simula, C. Tarantino, C. Urbach. 2010-04-08. A proposal for B-physics on current lattices. https://doi.org/10.1007/jhep04(2010)049

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