Thermal right-handed sneutrino dark matter in theFD-term model of hybrid inflation

Deppisch, Frank F.; Pilaftsis, Apostolos

doi:10.1088/1126-6708/2008/10/080

Cited by 41 publications

(32 citation statements)

References 89 publications

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“…our minimal RL models can account for the well-known problem of cold dark matter in the Universe. An obvious solution would be to consider supersymmetric versions of R'L scenarios [59,60] and study the relic abundance of the lightest stable supersymmetry particle, which could be a thermal right-handed sneutrino [61]. Alternatively, one may consider scale-invariant extensions of the SM with right-handed neutrinos [62,63], which are minimally augmented with one complex singlet scalar field whose oneloop induced vacuum expectation value can naturally explain the origin of the electroweak-scale mass of the heavy Majorana neutrinos.…”

Section: Discussionmentioning

confidence: 99%

Lepton flavor violation andθ13in minimal resonant leptogenesis

Deppisch

Pilaftsis

2011

Phys. Rev. D

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We study the impact of minimal nonsupersymmetric models of resonant leptogenesis on charged-lepton flavor violation and the neutrino-mixing angle 13 . Possible low-scale flavor realizations of resonant -, -and e-leptogenesis provide very distinct and predictive frameworks to explain the observed baryon asymmetry in the Universe by sphaleron conversion of an individual -, -and e-lepton-number asymmetry which gets resonantly enhanced via out-of-equilibrium decays of nearly degenerate heavy Majorana neutrinos. Based on approximate flavor symmetries, we construct viable scenarios of resonant -, -and e-leptogenesis compatible with universal right-handed neutrino masses at the grand unified theory scale, where the required heavy-neutrino mass splittings are generated radiatively. The heavy Majorana neutrinos in such scenarios can be as light as 100 GeV and their couplings to two of the charged leptons may be large. In particular, we explicitly demonstrate the compelling role that the three heavy Majorana neutrinos play, in order to obtain successful leptogenesis and experimentally testable rates for lepton-flavor violating processes, such as ! e and ! e conversion in nuclei.

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Section: Discussionmentioning

confidence: 99%

Lepton flavor violation andθ13in minimal resonant leptogenesis

Deppisch

Pilaftsis

2011

Phys. Rev. D

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“…For example, the next to minimal supersymmetric standard model (NMSSM) can be extended with right-handed neutrino superfield(s) which only couple(s) with the singlet Higgs [34,[45][46][47][48][49][50][51]. Some papers have discussed about the right-handed sneutrino dark matter annihilating into bb, exotics Higgs pairs.…”

Section: Introductionmentioning

confidence: 99%

Dark matter annihilation into right-handed neutrinos and the galactic center gamma-ray excess

Tang

Zhu

2016

J. High Energ. Phys.

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Abstract:In this paper, we will discuss a specific case that the dark matter particles annihilate into right-handed neutrinos. We calculate the predicted gamma-ray excess from the galactic center and compare our results with the data from the Fermi-LAT. An approximately 10-60 GeV right-handed neutrino with heavier dark matter particle can perfectly explain the observed spectrum. The annihilation cross section σv falls within the range 0.5-4 × 10 −26 cm 3 /s, which is roughly compatible with the WIMP annihilation cross section.

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“…Moreover, PAMELA, while reporting an excess in the electron/positron flux, claims no excess in the proton/antiproton flux [10]. Thus, one intriguing idea is that the DM carries lepton number, e.g., it is composed of right-handed scalar neutrinos (sneutrinos) in minimal [11][12][13] and extended [14][15][16] supersymmetric models. This framework might explain the preference for leptonic annihilation/decay products [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Hence the strength of their Yukawa interactions with the standard model (SM) fields governs whether they thermalize together with the rest of the MSSM matter [12,14,18]. On the other hand, if the lightest sneutrino 1 R is the lightest supersymmetric particle (LSP) and therefore is a potentially viable DM candidate, it can be produced with the right relic density from the decays of heavier superpartners [11].…”

Section: Introductionmentioning

confidence: 99%

Sneutrino dark matter: Symmetry protection and cosmic ray anomalies

et al. 2010

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We present an R-parity conserving model of sneutrino dark matter within a Higgsphilic Uð1Þ 0 extension of the minimal supersymmetric standard model. In this theory, the parameter and light Dirac neutrino masses are generated naturally upon the breaking of the Uð1Þ 0 gauge symmetry. One of the right-handed sneutrinos is the lightest supersymmetric particle. The leptonic and hadronic decays of another sneutrino, taken to be the next-to-lightest superpartner, allow for a natural fit to the recent results reported by the PAMELA experiment. We perform a detailed calculation of the dark matter relic density in this scenario, and show that the model is consistent with the ATIC and Fermi LAT experiments.

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Thermal right-handed sneutrino dark matter in theF_D-term model of hybrid inflation

Cited by 41 publications

References 89 publications

Lepton flavor violation andθ13in minimal resonant leptogenesis

Lepton flavor violation andθ13in minimal resonant leptogenesis

Dark matter annihilation into right-handed neutrinos and the galactic center gamma-ray excess

Sneutrino dark matter: Symmetry protection and cosmic ray anomalies

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