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Topological observables in many-flavour QCD

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arxiv 1601.04687 v1 pith:PAMV2AJ7 submitted 2016-01-18 hep-lat

Yasumichi Aoki , Tatsumi Aoyama , Ed Bennett , Masafumi Kurachi , Toshihide Maskawa , Kohtaroh Miura , Kei-ichi Nagai , Hiroshi Ohki
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Enrico Rinaldi Akihiro Shibata Koichi Yamawaki Takeshi Yamazaki
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keywords flavoursgaugetheorytopologicaladditionalappearbehaviourbelieved
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SU(3) gauge theory with eight massless flavours is believed to be walking, while the corresponding twelve- and four-flavour appear IR-conformal and confining respectively. Looking at the simulations performed by the LatKMI collaboration of these theories, we use the topological susceptibility as an additional probe of the IR dynamics. By drawing a comparison with SU(3) pure gauge theory, we see a dynamical quenching effect emerge at larger number of flavours, which is suggestive of emerging near-conformal and conformal behaviour.

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  1. A novel view of the flavor-singlet spectrum from multi-flavor QCD on the lattice

    hep-lat 2025-05 conditional novelty 6.0 of 10

    In SU(3) gauge theory with Nf = 4, 8, and 12 flavors, the normalized eta-prime mass sqrt(8t0) M_eta' takes values near 2.5, 5.0, and 7.5, consistent with n_f^2 scaling in the anti-Veneziano limit.

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