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The unreasonable effectiveness of effective string theory: the case of the 3d SU(2) Higgs model

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arxiv 2106.08784 v2 pith:IPCVNUII submitted 2021-06-16 hep-lat hep-th

classification hep-lathep-th
keywords stringeffectivebreakinghiggsmodeltheoryactionagree
verification ladder T0 review T1 audit T2 compute T3 formal
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We study string breaking in the three dimensional SU(2) Higgs model, using values of the gauge coupling for which the confinement-like and Higgs-like regions of the phase diagram are separated just by a smooth crossover. We show that even in the presence of string breaking, the confining part of the interquark potential is well described by the Effective String Theory and that also the fine details of the effective string, like the higher order terms of the Nambu-Goto action or the boundary correction, can be precisely extracted from the fits and agree with the effective string predictions. We comment on the implications of these results for QCD simulations with dynamical quarks.

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  1. Effective string description of the reconfined phase in the trace deformed $\mathrm{SU}(2)$ Yang-Mills theory in (2+1) dimensions

    hep-lat 2025-01 conditional novelty 6.0 of 10

    In the reconfined phase of trace deformed SU(2) gauge theory, the flux tube energy follows the Polchinski-Yang rigid string rather than the Nambu-Goto string.

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