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Charm mass effects in the static energy computed in 2+1+1 flavor lattice QCD | | Johannes Heinrich Weber
; Nora Brambilla
; Rafael L. Delgado
; Andreas Kronfeld
; Viljami Leino
; Peter Petreczky
; Sebastian Steinbeißer
; Antonio Vairo
; | | Date: |
15 Dec 2022 | | Abstract: | We report our analysis for the static energy in (2+1+1)-flavor QCD over a
wide range of lattice spacings and several quark masses. We obtain results for
the static energy out to distances of nearly 1 fm, allowing us to perform a
simultaneous determination of the lattice scales $r_2$, $r_1$ and $r_0$ as well
as the string tension, $sigma$. While our results for ${r_0}/{r_1}$ and $r_0$
$sqrt{sigma}$ agree with published (2+1)-flavor results, our result for
${r_1}/{r_2}$ differs significantly from the value obtained in the (2+1)-flavor
case, likely due to the effect of the charm quark. We study in detail the
effect of the charm quark on the static energy by comparing our results on the
finest lattices with the previously published (2+1)-flavor QCD results at
similar lattice spacing. The lattice results agree well with the two-loop
perturbative expression of the static energy incorporating finite charm mass
effects. | | Source: | arXiv, 2212.07665 | | Services: | Forum | Review | PDF | Favorites | |
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