High-Precision Charm-Quark Mass and QCD Coupling from Current-Current Correlators in Lattice and Continuum QCD

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dc.creatorAllison, I.
dc.creatorDalgic, E.
dc.creatorDavies, C. T. H.
dc.creatorFollana, E.
dc.creatorHorgan, R. R.
dc.creatorHornbostel, K.
dc.creatorLepage, G. P.
dc.creatorMcNeile, C.
dc.creatorShigemitsu, J.
dc.creatorTrottier, H.
dc.creatorWoloshyn, R. M.
dc.creatorChetyrkin, K. G.
dc.creatorKuhn, J. H.
dc.creatorSteinhauser, M.
dc.creatorSturm, C.
dc.date2008-05-20
dc.date2008-08-08
dc.date.accessioned2026-07-07T11:50:56Z
dc.date.available2026-07-07T11:50:56Z
dc.descriptionWe use lattice QCD simulations, with MILC gluon configurations and HISQ c-quark propagators, to make very precise determinations of moments of charm-quark pseudoscalar, vector and axial-vector correlators. These moments are combined with new four-loop results from continuum perturbation theory to obtain several new determinations of the MSbar mass of the charm quark and of the MSbar coupling. We find m_c(3GeV)=0.986(10)GeV, or, equivalently, m_c(m_c)=1.268(9)GeV, both for n_f=4 flavors; and alpha_msb(3GeV,n_f=4)=0.251(6), or, equivalently, alpha_\msb(M_Z,n_f=5)=0.1174(12). The new mass agrees well with results from continuum analyses of the vector correlator using experimental data for e+e- annihilation (instead of using lattice QCD simulations). These lattice and continuum results are the most accurate determinations to date of this mass. Ours is also one of the most accurate determinations of the QCD coupling by any method.
dc.description12 pages, 5 figures, 5 tables
dc.identifierhttps://arxiv.org/abs/0805.2999
dc.identifierhttp://arxiv.org/abs/0805.2999
dc.identifierPhys.Rev.D78:054513,2008
dc.identifierdoi:10.1103/PhysRevD.78.054513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203730
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleHigh-Precision Charm-Quark Mass and QCD Coupling from Current-Current Correlators in Lattice and Continuum QCD
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