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 The 30th International Symposium on Lattice Field Theory (LATTICE2012) - Weak Decays and Matrix Elements. SISSA [10.22323/1.164.0104].

B-physics from the ratio method with Wilson twisted mass fermions

FREZZOTTI, ROBERTO;ROSSI, GIANCARLO;
2012

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.
International Symposium on Lattice Field Theory (LATTICE 2012)
Cairns (Australia)
2012
30.
Rilevanza internazionale
contributo
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
eng
bottom: mass; B/s: decay; continuum limit; lattice field theory; quantum chromodynamics; numerical calculations: Monte Carlo; quark: mass: twist; quark: flavor: 2; quark: Wilson; bottom meson: decay
Intervento a convegno
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 The 30th International Symposium on Lattice Field Theory (LATTICE2012) - Weak Decays and Matrix Elements. SISSA [10.22323/1.164.0104].
Carrasco, N; Dimopoulos, P; Frezzotti, R; Gimenez, V; Herdoiza, G; Lubicz, V; Martinelli, G; Michael, C; Palao, D; Rossi, G; Sanfilippo, F; Shindler, A; Simula, S; Tarantino, C
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/78576
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