TY  - CONF
A1  - Herdoiza, Gregorio
A1  - Jansen, Karl
A1  - Lubicz, Vittorio
A1  - Tarantino, Cecilia
A1  - Sanfilippo, Francesco
A1  - Michael, Chris
A1  - Shindler, Andrea
A1  - Simula, Silvano
A1  - Urbach, Carsten
T1  - fB and fBs with maximally twisted Wilson fermions
T2  - Proceedings of Science
N2  - We present a lattice QCD calculation of the heavy-light decay constants fB and fBs performed with Nf = 2 maximally twisted Wilson fermions, at four values of the lattice spacing. The decay constants have been also computed in the static limit and the results are used to interpolate the observables between the charmand the infinite-mass sectors, thus obtaining the value of the decay constants at the physical b quark mass. Our preliminary results are fB = 191(14)MeV, fBs = 243(14)MeV, fBs/ fB = 1.27(5). They are in good agreement with those obtained with a novel approach, recently proposed by our Collaboration (ETMC), based on the use of suitable ratios having an exactly known static limit.
Y1  - 2012
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/27481
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-274818
SN  - 1824-8039
N1  - The XXVII International Symposium on Lattice Field Theory - LAT2009 July 26-31 2009 Peking University, Beijing, China
VL  - 2009
SP  - 1
EP  - 8
PB  - Scuola Internazionale Superiore di Studi Avanzati
CY  - Trieste
ER  -