Lattice QCD computation yields ground-state masses for spin-3/2+ heavy baryons with relativistic charm and bottom quarks, marking the first fully relativistic treatment of bottom quarks.
Ab-initio Determination of Light Hadron Masses
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abstract
More than 99% of the mass of the visible universe is made up of protons and neutrons. Both particles are much heavier than their quark and gluon constituents, and the Standard Model of particle physics should explain this difference. We present a full ab-initio calculation of the masses of protons, neutrons and other light hadrons, using lattice quantum chromodynamics. Pion masses down to 190 mega electronvolts are used to extrapolate to the physical point with lattice sizes of approximately four times the inverse pion mass. Three lattice spacings are used for a continuum extrapolation. Our results completely agree with experimental observations and represent a quantitative confirmation of this aspect of the Standard Model with fully controlled uncertainties.
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New analytic and Monte Carlo-assisted method tightens energy-based boson truncation bounds, reducing volume dependence in (1+1)D scalar and (2+1)D U(1) gauge theories.
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Heavy baryons with relativistic quarks
Lattice QCD computation yields ground-state masses for spin-3/2+ heavy baryons with relativistic charm and bottom quarks, marking the first fully relativistic treatment of bottom quarks.
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Tightening energy-based boson truncation bound using Monte Carlo-assisted methods
New analytic and Monte Carlo-assisted method tightens energy-based boson truncation bounds, reducing volume dependence in (1+1)D scalar and (2+1)D U(1) gauge theories.