Quenched heavy-light decay constants

Baxter, Rob; Booth, Stephen; Bowler, K.C.; Collins, Sara; Henty, David; Kenway, R. D.; Richards, David; Shanahan, H. P.; Simone, J. N.; Simpson, Alicia; Wilkes, B.E.; Ewing, Ann; Lellouch, Laurent; Sachrajda, Christopher; Wittig, Hartmut

doi:10.1103/physrevd.49.1594

Cited by 55 publications

(43 citation statements)

References 39 publications

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“…thus deviating slightly from some of our earlier papers, where we quoted 2.7 GeV as the central value [22,25,34]. The error in equation (18) is large enough to encompass all our estimates for a −1 from quantities such as m ρ , f π , m N , the string tension √ K and the hadronic scale R 0 discussed in [27].…”

Section: Details Of the Simulationcontrasting

confidence: 64%

“…For the analysis of this splitting we need the correlation function of the pseudoscalar meson, which was determined in an earlier simulation [34] using the same heavy quarks as this study, but with one additional light quark, corresponding to κ l = 0.14262. We find that there is very little to be gained by determining the difference of the masses from the time evolution by subtracting the two masses determined separately.…”

Section: λ−Pseudoscalar Meson Mass Splittingmentioning

confidence: 99%

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Heavy baryon spectroscopy from the lattice

et al. 1996

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The results of an exploratory lattice study of heavy baryon spectroscopy are presented. We have computed the full spectrum of the eight baryons containing a single heavy quark, on a 24 3 × 48 lattice at β = 6.2, using an O(a)-improved fermion action.We discuss the lattice baryon operators and give a method for isolating the contributions of the spin doublets (Σ, Σ * ), (Ξ ′ , Ξ * ) and (Ω, Ω * ) to the correlation function of the relevant operator. We compare our results with the available experimental data and find good agreement in both the charm and the beauty sectors, despite the long extrapolation in the heavy quark mass needed in the latter case. We also predict the masses of several undiscovered baryons. We compute the Λ − pseudoscalar meson and Σ − Λ mass splittings. Our results, which have errors in the range 10 − 30%, are in good agreement with the experimental numbers. For the Σ * − Σ mass splitting, we

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Section: Details Of the Simulationcontrasting

confidence: 64%

Section: λ−Pseudoscalar Meson Mass Splittingmentioning

confidence: 99%

Heavy baryon spectroscopy from the lattice

et al. 1996

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“…In all cases the solid line corresponds to the comparison of the pairs (q2, f210(q2)) with the q2 dependence of the form factors determined &om a two-parameter pole dominance fit to our data [giving the parameters in Eq. (43), for the case rcl = rcCrit,…”

Section: Resultsmentioning

confidence: 99%

“…We use spatially extended interpolat- of local operators between the vacuum and meson states, e.g., (MpslQy5q10) can be found in Refs. [40,43]. In Tables I11 and IV we show a summary of the mass spectrum found which we will use below.…”

Section: Details Of the Simulationmentioning

confidence: 98%

‘‘Improved’’ lattice study of semileptonic decays ofDmesons

Bowler

Hazel²,

Hoeber³

et al. 1995

Phys. Rev. D

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We present results of a lattice computation of the matrix elements of the vector and axial-vector currents which are relevant for the semileptonic decays D -+ K and D + K*. The computations are performed in the quenched approximation to lattice QCD on a 243 x 48 lattice at = 6.2, using an O(a)-improved fermionic action. In the limit of zero lepton masses the semileptonic decays D + K and D + K* are described by four form factors: f s , V, A1, and Ap, which are functions of q 2 , where --qF is the four-momentum transferred in the process. Our results for these form factors at q 2 = 0 are f 2 ( 0 ) = 0.67' :, V(0) = 1.01?::, Al(0) = 0.70?:,, Az(0) = 0.66+:0,, which are consistent with the most recent experimental world average values. We have also determined the q2 dependence of the form factors, which we find to be reasonably well described by a simple pole-dominance model.Results for other form factors, including those relevant to the decays D -+ T and D -+ p, are also given.PACS number(s): 13.20.Fc, 12.38.G~

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“…In figure 1 we compare some results for Φ(M P ) obtained using the static approximation 98,99,100 with those from the conventional formulation 99,101,102 . One observes rather high values in the static approximation, whereas the results using relativistic heavy quarks are much lower.…”

Section: Decay Constants and Heavy Quark Symmetrymentioning

confidence: 99%

Leptonic Decays of Heavy Quarks on the Lattice

Wittig

1997

Int. J. Mod. Phys. A

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The status of lattice calculations of heavy-light decay constants and of the B parameter B B is reviewed. After describing the lattice approach to heavy quark systems, the main results are discussed, with special emphasis on the systematic errors in present lattice calculations. A detailed analysis of the continuum limit for decay constants is performed. The implications of lattice results on studies of CP violation in the Standard Model are discussed. The status of lattice calculations of heavy-light decay constants and of the B parameter B B is reviewed. After describing the lattice approach to heavy quark systems, the main results are discussed, with special emphasis on the systematic errors in present lattice calculations. A detailed analysis of the continuum limit for decay constants is performed. The implications of lattice results on studies of CP violation in the Standard Model are discussed. (Submitted to International Journal of Modern Physics A)

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Quenched heavy-light decay constants

Abstract: We present results for heavy-light decay constants, using both propagating quarks and the static approximation, in O(a)-improved, quenched lattice QCD. At β = 6.2 on a 24 3 ×48 lattice we find f D = 185

Cited by 55 publications

References 39 publications

Heavy baryon spectroscopy from the lattice

Heavy baryon spectroscopy from the lattice

‘‘Improved’’ lattice study of semileptonic decays ofDmesons

Leptonic Decays of Heavy Quarks on the Lattice

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