Status of Lattice Flavor Physics

Wingate, Matthew

doi:10.1016/j.nuclphysbps.2004.11.138

Cited by 22 publications

(28 citation statements)

References 38 publications

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“…In our calculations we use for the heavy meson weak current coupling α = f H √ m H [56,57], which we derive from the lattice QCD value of f D = 0.225 GeV [58] and experimental D meson mass m D = 1.87 GeV [50] yielding α = 0.31 GeV 3/2 . The λ coupling was usually [18,59] determined from the value of V (0).…”

Section: Numerical Resultsmentioning

confidence: 99%

Charm meson resonances andD→Vsemileptonic form factors

Fajfer

Kamenik

2005

Phys. Rev. D

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Using limits of large energy effective theory and heavy quark effective theory we propose a simple parametrization of the heavy to light H → V semileptonic form factors. Then we reconsider D → V ℓν ℓ decays within a model which combines heavy meson and chiral symmetry. In our Lagrangians we include contributions coming from excited charm meson states, some of them recently observed. Within this framework we determine all parameters describing the shapes of the form factors and calculate branching ratios and helicity ratios for all D → V ℓν ℓ decays.

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Section: Numerical Resultsmentioning

confidence: 99%

Charm meson resonances andD→Vsemileptonic form factors

Fajfer

Kamenik

2005

Phys. Rev. D

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“…The determination of the CKM matrix elements using lattice QCD has been discussed long time; see, e.g., Refs. [9,10] for recent reviews. A more detailed review on recent lattice calculations of K meson physics (such as the K 0 −K 0 mixing and K → πlν decay) can be found in Ref.…”

Section: Pos(lat2005)013mentioning

confidence: 99%

CKM matrix with lattice QCD - the full determination using recent results

Okamoto¹

2005

Proceedings of XXIIIrd International Symposium on Lattice Field Theory — PoS(LAT2005)

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A full determination of the CKM matrix using recent results from lattice QCD is presented. To extract the CKM matrix in a uniform fashion, I exclusively use results from unquenched lattice QCD as the theory input for nonperturvative QCD effects. All 9 CKM matrix elements and all 4 Wolfenstein parameters are obtained from results for gold-plated quantities, which include semileptonic decay form factors and leptonic decay constants of B, D and K mesons, and B 0 −B 0 and K 0 −K 0 mixing amplitudes. XXIIIrd International Symposium on Lattice Field Theory

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“…Recently, there has been significant progress in computing these matrix elements on the lattice, with good control of the systematic uncertainties [1, 2, 3,4]. Since computation time increases as a high power of the inverse quark mass, the light (u, d) quark masses used in the simulations are heavier than in nature, and a chiral extrapolation is necessary to obtain physical results.…”

Section: Introductionmentioning

confidence: 99%

Heavy-light semileptonic decays in staggered chiral perturbation theory

Aubin

Bérnard

2007

Phys. Rev. D

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We calculate the form factors for the semileptonic decays of heavy-light pseudoscalar mesons in partially quenched staggered chiral perturbation theory (S χ PT), working to leading order in 1/m Q , where m Q is the heavy quark mass. We take the light meson in the final state to be a pseudoscalar corresponding to the exact chiral symmetry of staggered quarks. The treatment assumes the validity of the standard prescription for representing the staggered "fourth root trick" within S χ PT by insertions of factors of 1/4 for each sea quark loop. Our calculation is based on an existing partially quenched continuum chiral perturbation theory calculation with degenerate sea quarks by Bećirević, Prelovsek and Zupan, which we generalize to the staggered (and nondegenerate) case. As a by-product, we obtain the continuum partially quenched results with non-degenerate sea quarks. We analyze the effects of non-leading chiral terms, and find a relation among the coefficients governing the analytic valence mass dependence at this order. Our results are useful in analyzing lattice computations of form factors B → π and D → K when the light quarks are simulated with the staggered action.

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Status of Lattice Flavor Physics

Cited by 22 publications

References 38 publications

Charm meson resonances andD→Vsemileptonic form factors

Charm meson resonances andD→Vsemileptonic form factors

CKM matrix with lattice QCD - the full determination using recent results

Heavy-light semileptonic decays in staggered chiral perturbation theory

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