Theories of Neutrino Masses and Mixings

Mohapatra, Rabindra N.

doi:10.1007/978-3-662-04597-8_10

Cited by 9 publications

(6 citation statements)

References 114 publications

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“…If the masses are assumed to be of the same order of magnitude as the mass differences, this mass scale is of the order of about 0.1 eV. Various proposals have been made for 'explaining' such a tiny mass scale, each implying a certain magnitude for the Yukawa coupling Y N [2].…”

Section: Introductionmentioning

confidence: 99%

Right-handed sneutrinos as nonthermal dark matter

Gopalakrishna

Gouvêa

Porod

2006

J. Cosmol. Astropart. Phys.

112

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When the minimal supersymmetric standard model is augmented by three right-handed neutrino superfields, one generically predicts that the neutrinos acquire Majorana masses. We postulate that all supersymmetry (SUSY) breaking masses as well as the Majorana masses of the right-handed neutrinos are around the electroweak scale and, motivated by the smallness of neutrino masses, assume that the lightest supersymmetric particle (LSP) is an almost-pure right-handed sneutrino. We discuss the conditions under which this LSP is a successful dark matter candidate. In general, such an LSP has to be nonthermal in order not to overclose the universe, and we find the conditions under which this is indeed the case by comparing the Hubble expansion rate with the rates of the relevant thermalizing processes, including self-annihilation and co-annihilation with other SUSY and standard model particles.

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Section: Introductionmentioning

confidence: 99%

Right-handed sneutrinos as nonthermal dark matter

Gopalakrishna

Gouvêa

Porod

2006

J. Cosmol. Astropart. Phys.

112

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“…There is one case where we can have a direct connection between the PMNS leptonic mixing matrix and the neutrino mass matrix: when the neutrinos are Majorana particles, and we assume them to work on a weak-state basis, where the charged lepton mass matrix is diagonal. The scenario is in fact exciting since the smallness of neutrino mass can then be explained naturally by the seesaw mechanism [31][32][33] which is summarized in [34]. In this case, the Majorana mass matrix M Majorana ν is related to the leptonic mixing matrix U PMNS via…”

Section: A Reconstructive Neutrino Mass Matrixmentioning

confidence: 99%

Neutrino Mass Spectrum: Present Indication and Future Prospect

et al. 2022

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The fact that neutrinos are massive has been the most crucial evidence of physics beyond the Standard Model of elementary particles. To date, we still do not know how neutrinos get mass and why their mass is much smaller than that of their charged fermion cousins. The precise determination of the neutrino mass spectrum has become one of the central tasks of neutrino physics, providing critical input for understanding the nature of neutrino mass and extending our model. The present landscape of the neutrino mass spectrum is reviewed and explored in this article using data from the neutrino oscillation, cosmology, and beta decay. In addition, we discuss the possibility of relevant programs elucidating the neutrino mass spectrum in the coming decades.

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“…The second SU(2) singlet DM candidate of the MSSM is the scalar "righthanded" sneutrino. The right-handed sneutrino does not properly belong to the MSSM, which in its original formulation features massless neutrinos, but naturally emerges in SM extensions with right-handed neutrinos, which can give rise to the neutrino mass via small Yukawa couplings (if the right-handed neutrino is Dirac), or through the see-saw mechanism (if the right-handed neutrino is Majorana, see, e.g., [54] and references therein).…”

Section: Su(2) Singletsmentioning

confidence: 99%

The Discreet Charm of Higgsino Dark Matter: A Pocket Review

Kowalska

Sessolo

2018

Advances in High Energy Physics

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We give a brief review of the current constraints and prospects for detection of higgsino dark matter in low-scale supersymmetry. In the first part we argue, after performing a survey of all potential dark matter particles in the MSSM, that the (nearly) pure higgsino is the only candidate emerging virtually unscathed from the wealth of observational data of recent years. In doing so by virtue of its gauge quantum numbers and electroweak symmetry breaking only, it maintains at the same time a relatively high degree of model-independence. In the second part we properly review the prospects for detection of a higgsino-like neutralino in direct underground dark matter searches, collider searches, and indirect astrophysical signals. We provide estimates for the typical scale of the superpartners and fine tuning in the context of traditional scenarios where the breaking of supersymmetry is mediated at about the scale of Grand Unification and where strong expectations for a timely detection of higgsinos in underground detectors are closely related to the measured 125 GeV mass of the Higgs boson at the LHC.

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Theories of Neutrino Masses and Mixings

Abstract: Recent developments in our understanding of neutrino masses and their implications for physics beyond the standard model are reviewed.

Cited by 9 publications

References 114 publications

Right-handed sneutrinos as nonthermal dark matter

Right-handed sneutrinos as nonthermal dark matter

Neutrino Mass Spectrum: Present Indication and Future Prospect

The Discreet Charm of Higgsino Dark Matter: A Pocket Review

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