We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first preliminary results for the B-mesons bag parameter. Simulations are performed with Nf = 2 Wilson twisted mass fermions at four values of the lattice spacing and the results are extrapolated to the continuum limit. Our calculation benefits from the use of improved interpolating operators for the B-mesons and employs the so-called ratio method. The latter allows a controlled interpolation at the b-quark mass between the relativistic data around and above the charm quark mass and the exactly known static limit.
Carrasco, N., Dimopoulos, P., Frezzotti, R., Gimenez, V., Herdoiza, G., Lubicz, V., et al. (2012). B-physics from the ratio method with Wilson twisted mass fermions. In Proceedings of the 30th International Symposium on Lattice Field Theory - Lattice 2012 (pp.104).
B-physics from the ratio method with Wilson twisted mass fermions
LUBICZ, Vittorio;TARANTINO, CECILIA
2012-01-01
Abstract
We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first preliminary results for the B-mesons bag parameter. Simulations are performed with Nf = 2 Wilson twisted mass fermions at four values of the lattice spacing and the results are extrapolated to the continuum limit. Our calculation benefits from the use of improved interpolating operators for the B-mesons and employs the so-called ratio method. The latter allows a controlled interpolation at the b-quark mass between the relativistic data around and above the charm quark mass and the exactly known static limit.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
