1.
2.
Phys Rev Lett
; 100(24): 241802, 2008 Jun 20.
Artigo
em Inglês
| MEDLINE
| ID: mdl-18643571
RESUMO
The measured rate for D{s}{+}-->l+nu decays, where l is a muon or tau, is larger than the standard model prediction, which relies on lattice QCD, at the 3.8sigma level. We discuss how robust the theoretical prediction is, and we show that the discrepancy with experiment may be explained by a charged Higgs boson or a leptoquark.
3.
Phys Rev Lett
; 94(17): 172001, 2005 May 06.
Artigo
em Inglês
| MEDLINE
| ID: mdl-15904281
RESUMO
We use lattice QCD to predict the mass of the Bc meson. We use the MILC Collaboration's ensembles of lattice gauge fields, which have a quark sea with two flavors much lighter than a third. Our final result is mBc = 6304+/-12(+18)(-0) MeV. The first error bar is a sum in quadrature of statistical and systematic uncertainties, and the second is an estimate of heavy-quark discretization effects.