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Topological susceptibility of N_f=2+1 QCD from staggered fermions spectral projectors at high temperatures

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arxiv 2208.08921 v2 pith:SGPEVWRU submitted 2022-08-18 hep-lat hep-ph

Topological susceptibility of N_f=2+1 QCD from staggered fermions spectral projectors at high temperatures

Andreas Athenodorou , Claudio Bonanno , Claudio Bonati , Giuseppe Clemente , Francesco D'Angelo , Massimo D'Elia , Lorenzo Maio , Guido Martinelli
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Francesco Sanfilippo Antonino Todaro
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classification hep-lat hep-ph
keywords susceptibilitytopologicaldefinitionlatticeprojectorsrangespectralstaggered
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We compute the topological susceptibility of $N_f=2+1$ QCD with physical quark masses in the high-temperature phase, using numerical simulations of the theory discretized on a space-time lattice. More precisely we estimate the topological susceptibility for five temperatures in the range from $\sim200$ MeV up to $\sim600$ MeV, adopting the spectral projectors definition of the topological charge based on the staggered Dirac operator. This strategy turns out to be effective in reducing the large lattice artifacts which affect the standard gluonic definition, making it possible to perform a reliable continuum extrapolation. Our results for the susceptibility in the explored temperature range are found to be partially in tension with previous determinations in the literature.

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Cited by 3 Pith papers

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