Electroweak fermion number violation and the production of stable particles in the early universe

Barr, Stephen M.; Chivukula, R. Sekhar; Farhi, Edward

doi:10.1016/0370-2693(90)91661-t

Cited by 321 publications

(418 citation statements)

References 14 publications

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“…Being a probability density, its dimensionality can be easily reduced by integrating out less interesting (nuisance) parameter directions ψ i , yielding an n-dimensional marginal posterior pdf, P mar (θ 1 , ..., θ n |X) ∝ dψ 1 ...dψ m P(θ 1 , ..., θ n , ψ 1 ..., ψ m |X) , (A. 4) which is more amenable to visual presentation if n = 1, 2, and can be used to construct constraints on the remaining parameters. We employ a modified version of the generic Metropolis-Hastings sampler [108,109] included in the public MCMC code CosmoMC [110,111], to sample the posterior over the full parameter space.…”

Section: Discussionmentioning

confidence: 99%

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Arina

Sahu

2012

Nuclear Physics B

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Abstract. The nature of dark matter (DM) particles and the mechanism that provides their measured relic abundance are currently unknown. In this paper we investigate inert scalar and vector like fermion doublet DM candidates with a charge asymmetry in the dark sector, which is generated by the same mechanism that provides the baryon asymmetry, namely baryogenesis-via-leptogenesis induced by decays of scalar triplets. At the same time the model gives rise to neutrino masses in the ballpark of oscillation experiments via type II seesaw. We discuss possible sources of depletion of asymmetry in the DM and visible sectors and solve the relevant Boltzmann equations for quasi-equilibrium decay of triplet scalars. A Monte-Carlo-Markov-Chain analysis is performed for the whole parameter space. The survival of the asymmetry in the dark sector leads to inelastic scattering off nuclei. We then apply bayesian statistic to infer the model parameters favoured by the current experimental data, in particular the DAMA annual modulation and Xenon100 exclusion limit. The latter strongly disfavours asymmetric scalar doublet DM of mass O( TeV) as required by DM-DM oscillations, while an asymmetric vector like fermion doublet DM with mass around 100 GeV is a good candidate for DAMA annual modulation yet satisfying the constraints from Xenon100 data.

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Section: Discussionmentioning

confidence: 99%

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Arina

Sahu

2012

Nuclear Physics B

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“…From this result, we find that this scenario can produce the presently observed B asymmetry Y B = (0.6 − 1) × 10 −10 as far as N ≥ 5 forT R > 10 7 GeV. Since the X asymmetry disappears at the temperature less than T ss through the effects of the soft SUSY breakings, the X asymmetry cannot be related to the dark matter abundance in the universe [11].…”

Section: Generation Of B Asymmetrymentioning

confidence: 68%

“…Fixing its scale to the weak scale is called the µ-problem [14,15]. Usually the µ-term is considered to be spontaneously generated through, for example, a vacuum expectation value (VEV) 1 Similar scenario is proposed in some works in the different context [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

μ-term as the origin of baryon and lepton number asymmetry

Suematsu¹

2005

J. Phys. G: Nucl. Part. Phys.

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We study a possibility of combining an origin of the µ-term and the baryon and lepton number asymmetry. If we assume that the µ-term is generated through a flat direction of a singlet scalar field, the coherent oscillation of this condensate around its potential minimum can store the global U(1) charge asymmetry. The decay of this condensate can distribute this asymmetry into the lepton and baryon number asymmetry as far as its decay occurs at an appropriate temperature. We examine the compatibility between this scenario and the small neutrino mass generation based on both the ordinary seesaw mechanism and the bilinear R-parity violating terms. *

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“…One of the popular approaches is to consider dark matter with a conserved particle number and a particle-antiparticle asymmetry related to matter-antimatter asymmetry [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. (For a recent review, see, e.g., Ref.…”

Section: Introductionmentioning

confidence: 99%

Indirect detection of self-interacting asymmetric dark matter

Pearce

Kusenko

2013

Phys. Rev. D

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Self-interacting dark matter resolves the issue of cuspy profiles that appear in non-interacting cold dark matter simluations; it may additionally resolve the so-called "too big to fail" problem in structure formation. Asymmetric dark matter provides a natural explanation of the comparable densities of baryonic matter and dark matter. In this paper, we discuss unique indirect detection signals produced by a minimal model of self-interacting asymmetric scalar dark matter. Through the formation of dark matter bound states, a dark force mediator particle may be emitted; the decay of this particle may produce an observable signal. We estimate the produced signal and explicitly demonstrate parameters for which the signal exceeds current observations.

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Electroweak fermion number violation and the production of stable particles in the early universe

Cited by 321 publications

References 14 publications

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

Asymmetric inelastic inert doublet dark matter from triplet scalar leptogenesis

μ-term as the origin of baryon and lepton number asymmetry

Indirect detection of self-interacting asymmetric dark matter

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