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SUMMARY:Juan S. Cruz (Munich Tech. U.)
DTSTART:20201022T140000Z
DTEND:20201022T150000Z
DTSTAMP:20260423T003250Z
UID:IFTWeb/11
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IFTWeb/11/">
 Gradient effects on false vacuum decay in gauge theory</a>\nby Juan S. Cru
 z (Munich Tech. U.) as part of IFT-Madrid Webinars\n\n\nAbstract\nWe study
  false vacuum decay for a gauged complex scalar field in a polynomial pote
 ntial with nearly degenerate minima. Radiative corrections to the profile 
 of the nucleated bubble as well as the full decay rate are computed in the
  planar thin-wall approximation using the effective action. This allows to
  account for the inhomogeneity of the bounce background and the radiative 
 corrections in a self-consistent manner. In contrast to scalar or fermion 
 loops\, for gauge fields one must deal with a coupled system that mixes th
 e Goldstone boson and the gauge fields\, which considerably complicates th
 e numerical calculation of Green's functions. In addition to the renormali
 zation of couplings\, we employ a covariant gradient expansion in order to
  systematically construct the counterterm for the wave-function renormaliz
 ation. The result for the full decay rate however does not rely on such an
  expansion and accounts for all gradient corrections at the chosen truncat
 ion of the loop expansion. The ensuing gradient effects are shown to be of
  the same order of magnitude as non-derivative one-loop corrections.\n
LOCATION:https://researchseminars.org/talk/IFTWeb/11/
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