Vacuum stability, perturbativity, EWPD and Higgs-to-diphoton rate in type II seesaw models

A bstract 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 t...

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Bibliographic Details
Published in:The journal of high energy physics 2012-11, Vol.2012 (11), Article 106
Main Authors: Chun, Eung Jin, Lee, Hyun Min, Sharma, Pankaj
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Constraint modelling
Couplings
Elementary Particles
Higgs bosons
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
Stability
String Theory
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Summary:A bstract 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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2012)106