Higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar
Higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar
We consider an extension of the Standard Model involving two new scalar particles around the TeV scale: a singlet neutral scalar $\phi$, to be eventually identified as the Dark Matter candidate, plus a doubly charged $SU(2)_L$ singlet scalar, $S^{++}$, that can be the source for the non-vanishing neutrino masses and mixings. Assuming an unbroken $Z_2$ symmetry in the scalar sector, under which only the additional neutral scalar $\phi$ is odd, we write the most general (renormalizable) scalar potential. The model may be regarded as a possible extension of the conventional Higgs portal Dark Matter scenario which also accounts for neutrino mass and mixing. This framework cannot completely explain the observed positron excess. However a softening of the discrepancy observed in conventional Higgs portal framework can be obtained, especially when the scale of new physics responsible for generating neutrino masses and lepton number violating processes is around 2 TeV.
hep-ph
121-128
Hierro, I.M.
73dcf4ef-9c5b-4140-ae82-02dc8f6ef981
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Rigolin, S.
bc9cb11f-1723-4335-8428-c10a2f42cc1f
10 June 2017
Hierro, I.M.
73dcf4ef-9c5b-4140-ae82-02dc8f6ef981
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Rigolin, S.
bc9cb11f-1723-4335-8428-c10a2f42cc1f
Hierro, I.M., King, S.F. and Rigolin, S.
(2017)
Higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar.
Physics Letters B, 769, .
(doi:10.1016/j.physletb.2017.03.037).
Abstract
We consider an extension of the Standard Model involving two new scalar particles around the TeV scale: a singlet neutral scalar $\phi$, to be eventually identified as the Dark Matter candidate, plus a doubly charged $SU(2)_L$ singlet scalar, $S^{++}$, that can be the source for the non-vanishing neutrino masses and mixings. Assuming an unbroken $Z_2$ symmetry in the scalar sector, under which only the additional neutral scalar $\phi$ is odd, we write the most general (renormalizable) scalar potential. The model may be regarded as a possible extension of the conventional Higgs portal Dark Matter scenario which also accounts for neutrino mass and mixing. This framework cannot completely explain the observed positron excess. However a softening of the discrepancy observed in conventional Higgs portal framework can be obtained, especially when the scale of new physics responsible for generating neutrino masses and lepton number violating processes is around 2 TeV.
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Accepted/In Press date: 21 March 2017
e-pub ahead of print date: 22 March 2017
Published date: 10 June 2017
Additional Information:
16 pages, 4 figures
Keywords:
hep-ph
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Theory Group
Identifiers
Local EPrints ID: 409753
URI: http://eprints.soton.ac.uk/id/eprint/409753
ISSN: 0370-2693
PURE UUID: efbf2ce4-c9c0-45a0-87db-4eb97ae0c24b
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Date deposited: 01 Jun 2017 04:07
Last modified: 15 Mar 2024 13:59
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Author:
I.M. Hierro
Author:
S. Rigolin
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