Quenched chiral perturbation theory for heavy-light mesons

Sharpe, Stephen R.; Zhang, Yan

doi:10.1103/physrevd.53.5125

Cited by 139 publications

(235 citation statements)

References 17 publications

Supporting

Mentioning

214

Contrasting

Order By: Relevance

“…For the D-meson decay constants, we adopt again fit ansätze linear in m 2 π (and a 2 ), while for f D we also model the sea quark dependence in a fit form inspired by partially quenched heavy meson chiral perturbation theory (HMχPT) [22,23], treating the charm quark as heavy, viz.…”

Section: Preliminary Resultsmentioning

confidence: 99%

Charm quark mass and D-meson decay constants from two-flavour lattice QCD

Heitger¹,

Hippel²,

Schaefer³

et al. 2014

Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013)

View full text Add to dashboard Cite

We present a computation of the charm quark's mass and the leptonic D-meson decay constants f D and f D s in two-flavour lattice QCD with non-perturbatively O(a) improved Wilson quarks. Our analysis is based on the CLS configurations at two lattice spacings (a = 0.065 and 0.048 fm, where the lattice scale is set by f K ) and pion masses ranging down to ∼ 190 MeV at Lm π 4, in order to perform controlled continuum and chiral extrapolations with small systematic uncertainties. PoS(LATTICE 2013)475Charm quark mass and D-meson decay constants from Table 1: Parameters of the ensembles used: ensemble label, spatial extent of the lattice in lattice units, bare coupling β = 6/g 2 0 , lattice spacing a, hopping parameters of the sea and (valence) strange quarks, the mass of the sea pion and the number of configurations employed. All lattices have dimensions T ×L 3 with T = 2L.

show abstract

Section: Preliminary Resultsmentioning

confidence: 99%

Charm quark mass and D-meson decay constants from two-flavour lattice QCD

Heitger¹,

Hippel²,

Schaefer³

et al. 2014

Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013)

View full text Add to dashboard Cite

show abstract

“…[16,17] and generalized to partially quenched QCD in Ref. [18]. Heavy quark spin symmetry allows the pseudoscalar and vector mesons to be combined into a single field which annihilates a heavy-light meson:…”

Section: Staggered χPt With Heavy-light Mesonsmentioning

confidence: 99%

B→D*lνandB→Dlνform factors in staggered chiral perturbation theory

Laiho

Water

2006

Phys. Rev. D

View full text Add to dashboard Cite

We calculate the B → D and B → D * form factors at zero recoil in Staggered Chiral Perturbation Theory. We consider heavy-light mesons in which only the light (u, d, or s) quark is staggered; current lattice simulations generally use a highly improved action such as the Fermilab or NRQCD action for the heavy (b or c) quark. We work to lowest nontrivial order in the heavy quark expansion and to one-loop in the chiral expansion. We present results for a partially quenched theory with three sea quarks in which there are no mass degeneracies (the "1+1+1" theory) and for a partially quenched theory in which the u and d sea quark masses are equal (the "2+1" theory).We also present results for full (2+1) QCD, along with a numerical estimate of the size of staggered discretization errors. Finally, we calculate the finite volume corrections to the form factors and estimate their numerical size in current lattice simulations.

show abstract

“…[3] for the purely strong sector (strong interactions in the presence of external fields). It has been recently extended to the heavy-light meson sector [4], to vector mesons [5] and to the baryon sector [6]. It has been also used in the context of non-leptonic weak interactions [2,7].…”

Section: Introductionmentioning

confidence: 99%

Quenched chiral perturbation theory to one loop

Colangelo

Pallante

1998

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

We calculate the divergences of the generating functional of quenched Chiral Perturbation Theory at one loop, and renormalize the theory by an appropriate definition of the counterterms. We show that the quenched chiral logarithms can be accounted for by defining a renormalized B 0 parameter which, at lowest order, is proportional to the vacuum expectation value of the scalar quark density. Finally, we calculate several quantities at one loop to better analyze the modifications induced by quenching in the ultraviolet finite part of the one-loop corrections. We point out that some of the finite loop corrections may diverge in the chiral limit. PACS: 12.39.Fe, 12.38.Gc.

show abstract

Quenched chiral perturbation theory for heavy-light mesons

Cited by 139 publications

References 17 publications

Charm quark mass and D-meson decay constants from two-flavour lattice QCD

Charm quark mass and D-meson decay constants from two-flavour lattice QCD

B→D*lνandB→Dlνform factors in staggered chiral perturbation theory

Quenched chiral perturbation theory to one loop

Contact Info

Product

Resources

About