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

We compute the leptonic decay constants f D + , f Ds , and f K + , and the quark-mass ratios m c /m s and m s /m l in unquenched lattice QCD using the experimentally determined value of f π + for normalization. We use the MILC Highly Improved Staggered Quark ( |V cs | = 1.010(5)(18)(6), where the errors are from this calculation of the decay constants, the uncertainty in the experimental decay rates, structure-dependent electromagnetic corrections, and, in the case of |V us |, the uncertainty in |V ud |, respectively.

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“…FIG. 23: Unquenched lattice results for f D and f Ds [26,49,50,61,[68][69][70][71][72][73][74]. We do not include…”

Section: This Workmentioning

confidence: 99%

“…FIG.24: Unquenched lattice results for f Ds /f D[26,49,50,61,[68][69][70][71][72][73]. Results are grouped by the number of flavors from top to bottom: n f = 2 (green diamonds), n f = 2 + 1 (blue circles), and n f = 2 + 1 + 1 (purple squares).…”

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confidence: 99%

Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks

et al. 2014

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“…1, tagged by the names of the lattice groups. The results are from [1,2,3,4,5,6,7,8]. Note that some of the results are still preliminary.…”

Section: Lattice Results: Decay Constants Form Factorsmentioning

confidence: 99%

Lattice inputs for the determination of $|V_{cd}|$ and $|V_{cs}|$ from (semi-)leptonic decays

Koponen¹

2014

Preprint

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This paper is a review of recent lattice QCD results for D and D s meson leptonic and semileptonic decays. The theory inputs needed for the determination of V cd and V cs from experimental results are the meson decay constants (leptonic decays) and the form factors (semileptonic decays). In addition one can compare the shape of the form factors from lattice QCD and experiment, and use the full experimental q 2 range (partial decay rates in q 2 bins) to determine the CKM matrix elements.

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“…The bare (valence) strange quark mass had been tuned by imposing the ratios m 2 K /f 2 K and m 2 π /f 2 K to coincide with their physical values, where the scale is set by f K [41]. Irrespective of the sea quark mass, the bare mass parameter of the valence charm quark (represented by the hopping parameter κ c ) was fixed in [43] through a linear interpolation of m 2…”

Section: A Lattice Set-up and Analysis Techniquesmentioning

confidence: 99%

Leptonic D_s decays in two-flavour lattice QCD

Blossier,

Heitger,

Post

2018

Preprint

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We report on a two-flavour lattice QCD study of the Ds and D * s leptonic decays parameterized by the decay constants fD s and fD * s . As the phenomenology in the Ds sector seems very promising in the next years with the experiments LHCb and Belle II, it is worth putting a big effort in lattice computations regarding its non-perturbative QCD contributions. Before examining more challenging processes such as hadron-hadron transitions, a natural first step is to address some basic aspects in the context of leptonic decays, where systematic uncertainties from excited state contaminations and cutoff effects in the computation of charmed meson decay matrix elements can be investigated in a more straightforward setting.

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

Cited by 13 publications

References 6 publications

Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks

Charmed and light pseudoscalar meson decay constants from four-flavor lattice QCD with physical light quarks

Lattice inputs for the determination of $|V_{cd}|$ and $|V_{cs}|$ from (semi-)leptonic decays

Leptonic D_s decays in two-flavour lattice QCD

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