B Mixing on the Lattice : fB ,

B Physics on the Lattice: Λ, λ1, mb(mb), λ2, B 0 − ¯ B 0 mixing, fB and all

Status of lattice calculations of B-meson decays and mixing

The present status of lattice calculations of fB, BB and SU(3) flavour breaking ratios such as fBs/fB is reviewed. Particular attention is devoted to systematic uncertainties, such as those arising from the lack of simulation data for dynamical quarks with realistic masses, and the related difficulties associated with chiral extrapolations. Global averages for decay constants and mixing paramet...

Leptonic constant from B meson radiative decay

We propose a method to determine the leptonic decay constant fB∗ in the infinite heavy quark mass limit from the analysis of the radiative decay mode B− → lν̄lγ. The method relies on HQET symmetries and on experimental data from D∗0 → Dγ. E-mail address: [email protected] The measurement of fB and fB∗ , the leptonic decay constants of the B and B ∗ mesons, defined by the matrix elements: < ...

ar X iv : h ep - p h / 97 09 32 8 v 1 1 2 Se p 19 97 B Mixing on the Lattice : f B , f B s and Related Quantities

The MILC collaboration computation of heavy-light decay constants is described. Results for fB, fBs , fD, fDsand their ratios are presented. These results are still preliminary, but the analysis is close to being completed. Sources of systematic error, both within the quenched approximation and from quenching itself, are estimated, although the latter estimate is rather crude. A sample of our r...

B Decays on the Lattice

B decay phenomenology is a rapidly growing area of particle physics, as we expect that the precise measurements of various B meson decays provide rich information of the Standard Model and the physics beyond it. Following the successful CLEO, LEP and CDF experiments, the next generation B factories (BaBar and Belle) have just started operation, and other experimental projects will follow. Latti...

Measurements of D and Ds decay constants at CLEO

Meson decay constants in the B system are used to translate measurements of BB̄ mixing to CKMmatrix elements. Currently, it is not possible to determine fB accurately from leptonic B decays, so theoretical calculations of fB are used. Since the B s meson does not have l ν decays, it will never be possible to determine fBs experimentally, thus theory must be relied on. If calculations disagree on...