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

Authors :: Carrasco, N.
Dimopoulos, P.
Frezzotti, R.
Gimenez, V.
Lubicz, G. Herdoiza V.
Martinelli, G.
Michael, C.
Palao, D.
Rossi, G. C.
Sanfilippo, F.
Shindler, A.
Simula, S.
Tarantino, C.
Source :: PoS(Lattice 2012)104
Publication Year :: 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.<br />Comment: 7 pages, 4 figures, 1 table. Proceedings of the 30th International Symposium on Lattice Field Theory - Lattice 2012; June 24-29, 2012; Cairns, Australia