We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first results for the B-meson bag parameters. For our computation we employ the so-called ratio method and our results benefit from the use of improved interpolating operators for the B-mesons. QCD calculations are performed with Nf = 2 dynamical light-quarks at four values of the lattice spacing and the results are extrapolated to the continuum limit. The preliminary results are mb(mb) = 4.35(12) GeV for the MSbar b-quark mass, fBs = 234(6) MeV and fB = 197(10) MeV for the B-meson decay constants, BBs(mb) = 0.90(5) and BB(mb) = 0.87(5) for the B-meson bag parameters.
Carrasco, N., Dimopoulos, P., Frezzotti, R., Gimenez, V., Herdoiza, G., Lubicz, V., et al. (2013). B-physics from lattice QCD...with a twist. In 36th International Conference on High Energy Physics (ICHEP2012) - Parallel Session 10 - Lattice QCD. SISSA [10.22323/1.174.0428].
B-physics from lattice QCD...with a twist
FREZZOTTI, ROBERTO;ROSSI, GIANCARLO;
2013-01-01
Abstract
We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first results for the B-meson bag parameters. For our computation we employ the so-called ratio method and our results benefit from the use of improved interpolating operators for the B-mesons. QCD calculations are performed with Nf = 2 dynamical light-quarks at four values of the lattice spacing and the results are extrapolated to the continuum limit. The preliminary results are mb(mb) = 4.35(12) GeV for the MSbar b-quark mass, fBs = 234(6) MeV and fB = 197(10) MeV for the B-meson decay constants, BBs(mb) = 0.90(5) and BB(mb) = 0.87(5) for the B-meson bag parameters.| File | Dimensione | Formato | |
|---|---|---|---|
|
ICHEP-1212.0301v1.pdf
accesso aperto
Descrizione: main article - file pdf
Tipologia:
Versione Editoriale (PDF)
Licenza:
Creative commons
Dimensione
266.85 kB
Formato
Adobe PDF
|
266.85 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
