Impacts of the Higgs mass on vacuum stability, running fermion masses and two-body Higgs decays
By Z. Xing, He Zhang, Shun Zhou. 2011
138 citations recorded by the source corpus.
The recent results of the ATLAS and CMS experiments indicate 116 GeV less than or similar to M-H less than or similar to 131 GeV and 115 GeV less than or similar to M-H less than or similar to 127 GeV, respectively, for the mass of the Higgs boson in the standard model (SM) at the 95% confidence level. In particular, both experiments point to a preferred narrow mass range M-H similar or equal to (124 . . . 126) GeV. We examine the impact of this preliminary result of M-H on the SM vacuum stability by using the two-loop renormalization-group equations, and arrive at the cutoff scale Lambda(VS) similar to 4 X 10(12) GeV (for M-H = 125 GeV, M-t = 172.9 GeV, and alpha(s)(M-Z) = 0.1184), where the absolute stability of the SM vacuum is lost and some kind of new physics might take effect. We update the values of running lepton and quark masses at some typical energy scales, including the ones characterized by M-H, 1 TeV and Lambda(VS), with the help of the two-loop renormalization-group equations. The branching ratios of some important two-body Higgs decay modes, such as H -> b (b) over bar, H -> tau(+)tau(-), H -> gamma gamma, H -> W+W-, and H -> ZZ, are also recalculated by inputting the values of relevant particle masses at M-H.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/bed54c0d3180e75af059b970148848ab7406137b
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In Nuclear and High Energy Physics
Citations in the corpus
- Flavor structures of charged fermions and massive neutrinos (2019, methodology): “For the sake of illustration, here we simply suggest the following preliminary measures of weak and strong CP-violating effects in the quark sector of the SM [254] 12: CPweak ∼ 1 Λ6EW ( mu − mc ) ( mc − mt ) ( mt − mu ) ( md − ms ) ( ms − mb ) ( mb − md )Jq ∼ 10−13 , CPstrong ∼ 1 Λ6QCD mumcmtmdmsmb ”