Semileptonic B Decays with Dynamical Quarks

Shigemitsu, J.; Davies, C. T. H.; Dougall, A.; Foley, Kerryann M.; Gámiz, E.; Gray, Alan; Gulez, Emel; Lepage, G. Peter; Wintage, M.

doi:10.1016/j.nuclphysbps.2004.11.123

Cited by 22 publications

(27 citation statements)

References 13 publications

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“…For exclusive B → πℓν decay, we use for the SM prediction the parameterization of Ref. [30], which relies on analyticity constraints and lattice QCD calculations of the form factors at large q 2 [31,32]. The NP contribution is…”

Section: Exclusive and Inclusive B → Uℓν Decaysmentioning

confidence: 99%

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Deciphering top flavor violation at the CERN LHC withBfactories

et al. 2008

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The LHC will have unprecedented sensitivity to flavor-changing neutral current (FCNC) top quark decays, whose observation would be a clear sign of physics beyond the standard model. Although many details of top flavor violation are model dependent, the standard model gauge symmetries relate top FCNCs to other processes, which are strongly constrained by existing data. We study these constraints in a model independent way, using a low energy effective theory from which the new physics is integrated out. We consider the most important operators which contribute to top FCNCs and analyze the current constraints on them. We find that the data rule out top FCNCs at a level observable at the LHC due to most of the operators comprising left-handed first or second generation quark fields, while there remains a substantial window for top decays mediated by operators with right-handed charm or up quarks. If FCNC top decays are observed at the LHC, such an analysis may help decipher the underlying physics.

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Section: Exclusive and Inclusive B → Uℓν Decaysmentioning

confidence: 99%

“…4. (This uses the lattice QCD input from Fermilab [31], and the one using the HPQCD calculation [32] would also be similar. )…”

Section: Exclusive and Inclusive B → Uℓν Decaysmentioning

confidence: 99%

Deciphering top flavor violation at the CERN LHC withBfactories

et al. 2008

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“…Another lattice result is HPQCD04 [38]. One can also perform a a BK-based fit to this result, obtaining a value of α = 0.41 ± 0.07.…”

Section: Semileptonic π and ρ Modesmentioning

confidence: 99%

Radiative Leptonic B Decays

Tann

2007

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“…In the simple case of B → πℓν and massless leptons only one FF is needed. The absolute value of this FF is predicted by several theoretical frameworks (light-cone sum rules (LCSR) [15], lattice QCD (LQCD) [16,17], and quark models); the dependence on q 2 can be checked experimentally, thereby allowing to discriminate different theoretical calculations. The BABAR measurement [18] agrees with LCSR and LQCD but disfavours the quark model ISGWII [19].…”

Section: Charmless Semileptonic Decaysmentioning

confidence: 99%