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Vacuum Stability, Perturbativity, EWPD and Higgs-to-diphoton rate in Type II Seesaw Models

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arxiv 1209.1303 v2 pith:X4Y72WEM submitted 2012-09-06 hep-ph

Vacuum Stability, Perturbativity, EWPD and Higgs-to-diphoton rate in Type II Seesaw Models

Eung Jin Chun , Hyun Min Lee , Pankaj Sharma This is my paper
classification hep-ph
keywords ewpdhiggscut-offhiggs-to-diphotonmassperturbativityratescale
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study constraints from perturbativity and vacuum stability as well as the EWPD in the type II seesaw model. As a result, we can put stringent limits on the Higgs triplet couplings depending on the cut-off scale. The EWPD tightly constrain the Higgs triplet mass splitting to be smaller than 40 GeV. Analyzing the Higgs-to-diphoton rate in the allowed parameter region, we show a possible enhancement by up to 100 % and 50 % for the cut-off scale of 100 TeV and $10^{19}$ GeV, respectively, if the doubly charged Higgs boson mass is as low as 100 GeV.

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