Neutrino masses, baryogenesis and bilinear R-parity violation

Akeroyd, A. G.; Chun, Eung Jin; Díaz, M. A.; Jung, Dong‐Won

doi:10.1016/j.physletb.2003.12.028

Cited by 3 publications

(2 citation statements)

References 65 publications

(51 reference statements)

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“…[25,26] and references therein. Moreover, this class of models is also consistent with constraints from baryogenesis [27]. Now, what about dark matter?…”

Section: Jhep01(2010)058supporting

confidence: 71%

Strong dark matter constraints on GMSB models

Staub

Niemeyer

Porod

2010

J. High Energ. Phys.

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We reconsider the dark matter problem in supersymmetric models with gauge mediated supersymmetry breaking, with and without R-parity breaking. In these classes of models, a light gravitino forms the dark matter. Consistency with the experimental data, in particular the dark matter abundance and the small-scale power spectrum, requires additional entropy production after the decoupling of the gravitino from the thermal bath. We demonstrate that the usual mechanism via messenger number violating interactions does not work in models where the messenger belongs to SU(5) representations. This is mainly a consequence of two facts: (i) there are at least two different types of lightest messenger particles and (ii) the lightest messenger particle with SU(2) quantum numbers decays dominantly into vector bosons once messenger number is broken, a feature which has been overlooked so far. In case of SO(10) messenger multiplets we find scenarios which work if the SM gauge singlet component is rather light.

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“…[25,26] and references therein. Moreover, this class of models is also consistent with constraints from baryogenesis [27]. Now, what about dark matter?…”

Section: Jhep01(2010)058supporting

confidence: 71%

Strong dark matter constraints on GMSB models

Staub

Niemeyer

Porod

2010

J. High Energ. Phys.

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“…In accordance to Refs. [64,65] the wash-out of an initial asymmetry driven by the backreaction of leptons, quarks, neutrinos and their antiparticles to the LSP and the decays of the LSP itself stays small, if just one of the flavor final states is suppressed with respect to the others and thus decays out of equilibrium. To confirm this statement Fig.…”

Section: Lepton Asymmetries In the Cp Conserving Brpvmentioning

confidence: 99%

CPviolation in bilinearR-parity violation and its consequences for the early universe

2014

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Supersymmetric models with bilinear R-parity violation (BRpV) provide a framework for neutrino masses and mixing angles to explain neutrino oscillation data. We consider CP violation within the new physical phases in BRpV and discuss their effect on the generation of neutrino masses and the decays of the lightest supersymmetric particle (LSP), being a light neutralino with mass ∼ 100 GeV, at next-to-leading order. The decays affect the lepton and via sphaleron transitions the baryon asymmetry in the early universe. For a rather light LSP, asymmetries generated before the electroweak phase transition via e.g. the Affleck-Dine mechanism are reduced up to two orders of magnitude, but are still present. On the other hand, the decays of a light LSP themselves can account for the generation of a lepton and baryon asymmetry, the latter in accordance to the observation in our universe, since the smallness of the BRpV parameters allows for an out-of-equilibrium decay and sufficiently large CP violation is possible consistent with experimental bounds from the non-observation of electric dipole-moments.

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Neutrinos in anomaly mediated supersymmetry breaking withR-parity violation

Campos

Díaz

Éboli³

et al. 2005

Phys. Rev. D

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We show that a supersymmetric standard model exhibiting anomaly mediated supersymmetry breaking can generate naturally the observed neutrino mass spectrum as well mixings when we include bilinear R-parity violation interactions. In this model, one of the neutrinos gets its mass due to the tree level mixing with the neutralinos induced by the R-parity violating interactions while the other two neutrinos acquire their masses due to radiative corrections. One interesting feature of this scenario is that the lightest supersymmetric particle is unstable and its decay can be observed at high energy colliders, providing a falsifiable test of the model.

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Neutrino masses, baryogenesis and bilinear R-parity violation

Cited by 3 publications

References 65 publications

Strong dark matter constraints on GMSB models

Strong dark matter constraints on GMSB models

CPviolation in bilinearR-parity violation and its consequences for the early universe

Neutrinos in anomaly mediated supersymmetry breaking withR-parity violation

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