### False vacuum as an unstable stateFalse vacuum as an unstable state

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 Author Urbanowski, K. Source Directory of Open Access Journals (DOAJ) Content type Text Publisher EDP Sciences File Format PDF Date Created 2016-11-17 Copyright Year ©2016 Language English
 Subject Domain (in LCC) QC1-999 Subject Keyword Science ♦ Physics Abstract Calculations performed within the Standard Model suggest that the electroweak vacuum is unstable if MH < 126 GeV, (MH is the mass of the Higgs particle). LHC discovery of the Higgs boson indicates that MH ≃ 125 GeV. So the vacuum in our Universe may be unstable. We analyze properties of unstable vacuum states from the point of view of the quantum theory. At asymptotically late times the survival probability as a function of time t has an inverse power–like form. We show that at this time region the energy of the false vacuum states tends to the energy of the true vacuum state as 1/t2 for t → ∞. This means that the energy density in the unstable vacuum state should have analogous properties and hence the cosmological constant Λ = Λ(t) too. So Λ in the Universe with the unstable vacuum should have a form of the sum of the “bare” cosmological constant and of the term of a type 1/t2:Λ(t)≡Λbare+dt2$1/{{\rm{t}}^2}:\Lambda (t) \equiv {\Lambda ^{{\rm{bare}}}} + {{\rm{d}} \over {{{\rm{t}}^2}}}$, (where Λbare is the cosmological constant for the Universe with the true vacuum). ISSN 2100014X Age Range 18 to 22 years ♦ above 22 year Educational Use Research Education Level UG and PG ♦ Career/Technical Study Learning Resource Type Article Publisher Date 2016-01-01 e-ISSN 2100014X Journal EPJ Web of Conferences Volume Number 126 Starting Page 05014
Source: Directory of Open Access Journals (DOAJ)