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SUMMARY:Vacuum stability\, Higgs and top masses\, and new physics
DTSTART;VALUE=DATE-TIME:20140705T081500Z
DTEND;VALUE=DATE-TIME:20140705T083000Z
DTSTAMP;VALUE=DATE-TIME:20260819T232332Z
UID:indico-contribution-1596@indico.ific.uv.es
DESCRIPTION:Speakers: Vincenzo Branchina (University of Catania)\nOne of t
 he scenarios considered in these days explores the possibility\nfor the SM
  to be valid up to the Planck scale. The phase diagram for\nthe stability 
 of the EW vacuum is then derived assuming that new\nphysics interactions a
 t this scale have no impact on it. In \nparticular\, for the central value
 s of M_H and M_t\, the EW vacuum is\nmetastable\, and its lifetime is obta
 ined ignoring new physics.\nI show that\, although new physics interaction
 s appear in terms of \nhigher dimensional operators (and we could naively 
 expect their\ncontribution to be suppressed)\, due to the non-perturbative
  nature of\nthe tunnelling\, they can have great impact on the EW vacuum l
 ifetime. \nAs a result\, the SM phase diagram\, far from being universal\,
  strongly\ndepends on new physics. This has a far reaching consequences\, 
 as \nspecific BSM candidates can be tested against this stability analysis
 .\nFinally\, contrary to some claims\, higher precision measurements of M_
 t \nand M_H  cannot provide any definite response on the stability of the\
 nEW vacuum. The latter strongly depends on new physics.\n\nhttps://indico.
 ific.uv.es/event/2025/contributions/1596/
LOCATION: Auditorium 1
URL:https://indico.ific.uv.es/event/2025/contributions/1596/
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