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Improved Nonrelativistic QCD for Heavy Quark Physics
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We construct an improved version of nonrelativistic QCD for use in lattice simulations of heavy quark physics, with the goal of reducing systematic errors from all sources to below 10\%. We develop power counting rules to assess the importance of the various operators in the action and compute all leading order corrections required by relativity and finite lattice spacing. We discuss radiative corrections to tree level coupling constants, presenting a procedure that effectively resums the largest such corrections to all orders in perturbation theory. Finally, we comment on the size of nonperturbative contributions to the coupling constants.
Forward citations
Cited by 18 Pith papers
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A Phenomenological Model of Mesons for Charged Current Weak Decays
A symmetry-guided phenomenological model organizes leading current-current operators for charged-current decays of heavy-light mesons and reproduces heavy-quark scaling relations for decay constants and form factors.
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Quarkonium Parton Shower in Herwig 7
Herwig 7 gains a quarkonium parton shower using NRQCD factorisation with spin-colour projections, including singlet, octet and diquark channels.
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Nonrelativistic meson masses from the Curci-Ferrari model
A potential model built from the Curci-Ferrari massive-gluon action fits charm and bottom meson spectra, and the fit prefers a nonzero gluon mass.
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New high-precision $b$, $c$, and $s$ masses from pseudoscalar-pseudoscalar correlators in $n_f=4$ lattice QCD
New high-precision MS-bar masses m_b(m_b, n_f=5)=4.1923(63) GeV, m_c(3 GeV, n_f=4)=0.9813(34) GeV, and m_s(3 GeV, n_f=4)=83.39(26) MeV from HISQ lattice QCD correlators including quenched QED.
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Finite temperature hadronic spectral properties
Doubly charmed baryons stay stable and the bottomonium ground state loses 30 to 40 MeV as quark-gluon plasma temperature rises, according to new lattice QCD ensembles.
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Revisiting lifetimes of doubly charmed baryons
Updated predictions within the heavy quark expansion confirm the lifetime hierarchy τ(Ξ_cc^+) < τ(Ω_cc^+) < τ(Ξ_cc^++) with τ(Ξ_cc^++) = 0.32 ± 0.05 +0.08/-0.07 ps matching LHCb data and provide ratios for the other states.
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NRQCD Bottomonium at non-zero temperature using time-derivative moments
A time-derivative moment method applied to NRQCD lattice correlators extracts bottomonium masses and thermal widths, finding increasing width and decreasing mass with temperature.
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The NRQCD $\Upsilon$ spectrum at non-zero temperature using Backus-Gilbert regularisations
On FASTSUM Generation 2L ensembles, Backus-Gilbert and Tikhonov reconstructions agree on the Upsilon ground-state mass, but the decay width is dominated by reconstruction smearing and high-temperature broadening is un...
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Non-relativistic QCD Study of Excited Bottomonia at Finite Temperatures on a Fine Lattice
Excited bottomonia in a quark-gluon plasma acquire temperature-dependent widths with no significant mass shifts, according to a Gaussian model fit to lattice NRQCD correlators.
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Lattice perspectives on doubly heavy tetraquarks
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