Neutrino Mass, Coupling Unification, Verifiable Proton Decay, Vacuum Stability, and WIMP Dark Matter in SU(5)
Autor: | Biswonath Sahoo, M. K. Parida, Mainak Chakraborty |
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Rok vydání: | 2018 |
Předmět: |
Physics
Nuclear and High Energy Physics Gauge boson Particle physics Article Subject 010308 nuclear & particles physics Proton decay High Energy Physics::Phenomenology Scalar (mathematics) FOS: Physical sciences 01 natural sciences lcsh:QC1-999 Higgs sector Standard Model High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Higgs boson High Energy Physics::Experiment Neutrino 010306 general physics Super-Kamiokande lcsh:Physics |
Zdroj: | Advances in High Energy Physics Advances in High Energy Physics, Vol 2018 (2018) |
ISSN: | 1687-7365 1687-7357 |
Popis: | Nonsupersymmetric minimal SU(5) with Higgs representations ${24}_H$ and $5_H$ and standard fermions in ${\bar 5}_F\oplus {10}_F$ is well known for its failure in unification of gauge couplings and lack of predicting neutrino masses. Like standard model, it is also affected by the instability of the Higgs scalar potential. We note that extending the Higgs sector by ${75}_H$ and ${15}_H$ not only leads to the popular type-II seesaw ansatz for neutrino masses with a lower bound on the triplet mass $M_{\Delta} > 2\times 10^9$ GeV, but also achieves precision unification of gauge couplings without proliferation of non-standard light Higgs scalars or fermions near the TeV scale. Consistent with recent LUX-2016 lower bound, the model easily accommodates a singlet scalar WIMP dark matter near the TeV scale which resolves the vacuum stability issue even after inclusion of heavy triplet threshold effect. We estimate proton lifetime predictions for $p\to e^+\pi^0$ including uncertainties due to input parameters and threshold effects due to superheavy Higgs scalars and superheavy $X^{\pm 4/3},Y^{\pm 1/3}$ gauge bosons. The predicted lifetime is noted to be verifiable at Super Kamiokande and Hyper Kamiokande experiments. Comment: 36 pages, 9 figures (Accepted for publication in Advances in High Energy Physics) |
Databáze: | OpenAIRE |
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