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arXiv · 2501.17036

Logarithmic corrections to O($a^2$) effects in lattice QCD with unrooted Staggered quarks

Nikolai Husung
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Abstract

We derive the asymptotic lattice-spacing dependence $a^2[2b_0\bar{g}^2(1/a)]^{\hat{\gamma}_i}$ relevant for spectral quantities of lattice QCD, when using unrooted Staggered quarks. Without taking any effects from matching into account we find $\min_i\hat{\gamma}_i\approx -0.273, -0.301, -0.913, -2.614$ for $N_\mathrm{f}=0,4,8,12$ respectively. Common statements in the literature on the absence of mass-dimension~5 operators from the on-shell basis of the Symanzik Effective Field Theory action are being clarified for a description using strictly local tastes, here playing the role of continuum quark flavours. Potential impact of $\mathrm{O}(a)$ EOM-vanishing terms beyond spectral quantities is being discussed.

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Nikolai Husung. 2025-01-28. Logarithmic corrections to O($a^2$) effects in lattice QCD with unrooted Staggered quarks. https://arxiv.org/abs/2501.17036

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