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Inverse seesaw and dark matter in a gauged B - L extension with flavour symmetry
Indian Inst Technol Guwahati, Gauhati 781039, Assam, India..
KTH, School of Engineering Sciences (SCI), Physics.ORCID iD: 0000-0002-6071-8546
HBNI, Harish Chandra Res Inst, Chhatnag Rd, Allahabad 211019, Uttar Pradesh, India..
2018 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 8, article id 062Article in journal (Refereed) Published
Abstract [en]

We propose a model which generates neutrino masses by the inverse seesaw mechanism, provides a viable dark matter candidate and explains the muon (g - 2) anomaly. The Standard Model (SM) gauge group is extended with a gauged U(1)(B-L) as well as a gauged U(1)(L mu-L tau). While U(1)(L mu-L tau) is anomaly free, the anomaly introduced by U(1)(B-L) is cancelled between the six SM singlet fermions introduced for the inverse seesaw mechanism and four additional chiral fermions introduced in this model. After spontaneous symmetry breaking the four chiral fermionic degrees of freedom combine to give two Dirac states. The lightest Dirac fermion becomes stable and hence the dark matter candidate. We focus on the region of the parameter space where the dark matter annihilates to the right-handed neutrinos, relating the dark matter sector with the neutrino sector. The U(1)(L mu-L tau), gauge symmetry provides a flavour structure to the inverse seesaw framework, successfully explaining the observed neutrino masses and mixings. We study the model parameters in the light of neutrino oscillation data and find correlation between them. Values of some of the model parameters are shown to be mutually exclusive between normal and inverted ordering of the neutrino mass eigenstates. Moreover, the muon (g - 2) anomaly can be explained by the additional contribution arising from U(1)(L mu-L tau) gauge boson.

Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2018. no 8, article id 062
Keywords [en]
Neutrino Physics, Beyond Standard Model, Cosmology of Theories beyond the SM
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-234612DOI: 10.1007/JHEP08(2018)062ISI: 000441808600009Scopus ID: 2-s2.0-85051788093OAI: oai:DiVA.org:kth-234612DiVA, id: diva2:1248166
Note

QC 20180914

Available from: 2018-09-14 Created: 2018-09-14 Last updated: 2018-09-14Bibliographically approved

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