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SUMMARY:Gauge dependence and the Standard Model vacuum stability - Luca Di
  Luzio (KIT\, Karlsruhe)
DTSTART:20140130T150000Z
DTEND:20140130T160000Z
UID:TALK50269@talks.cam.ac.uk
CONTACT:Marco Nardecchia
DESCRIPTION:After reviewing the calculation of the one-loop effective pote
 ntial in a linear R_\\xi gauge\, I discuss which are the physical (gauge i
 ndependent) observables entering the vacuum stability analysis. In particu
 lar\, the field value at which the effective potential turns negative (the
  so-called instability scale\, often identified with the scale of “new p
 hysics") is essentially gauge dependent. Such a gauge ambiguity is explici
 tly shown in the case of the Standard Model.
LOCATION:MR11\, CMS\, Wilberforce Road\, Cambridge\, CB3 0WB
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