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Spectral functions of confined particles

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arxiv 1904.08172 v3 pith:3SZJF4WX submitted 2019-04-17 hep-ph hep-lathep-th

Spectral functions of confined particles

classification hep-ph hep-lathep-th
keywords gluonfunctionsghostpolesspectraladdressedalonganalytic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We determine the gluon and ghost spectral functions along with the analytic structure of the associated propagators from numerical data describing gauge correlators at space-like momenta obtained by either solving the Dyson-Schwinger equations or through lattice simulations. Our novel reconstruction technique shows the expected branch cut for the gluon and the ghost propagator, which, in the gluon case, is supplemented with a pair of complex conjugate poles. Possible implications of the existence of these poles are briefly addressed.

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Cited by 2 Pith papers

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