A model for leptogenesis at the TeV scale

Abada, Asmâa; Aissaoui, H.; Losada, M.

doi:10.1016/j.nuclphysb.2005.08.003

Cited by 30 publications

(20 citation statements)

References 30 publications

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“…Reference [65] considered the BE for the asymmetries in B/3 − L α , but did not emphasize that the results were significantly different from the single flavour approximation. In subsequent years, various authors [173,207,208] noticed that flavour effects could be used to enhance the baryon asymmetry in particular models. The flavoured BE are given in [66].…”

Section: Flavour Effectsmentioning

confidence: 99%

Leptogenesis

2008

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Leptogenesis is a class of scenarios where the baryon asymmetry of the Universe is produced from a lepton asymmetry generated in the decays of a heavy sterile neutrino. We explain the motivation for leptogenesis. We review the basic mechanism, and describe subclasses of models. We then focus on recent developments in the understanding of leptogenesis: finite temperature effects, spectator processes, and in particular the significance of flavor physics.Comment: 111 pages, 8 figures. Added Sect. 3 on anomalous B+L violation. Corrected equations (6.30) and (6.31). Added Sect. 9.1 with a simple example of the effects of flavours. Revised Sect. 10.1 on susy leptogenesis. Added several references, and other minor improvements. To be published in Physics Report

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Section: Flavour Effectsmentioning

confidence: 99%

Leptogenesis

2008

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“…Hence this type of "off-shell" contributions are not taken into account by ordinary methods. 16 15 See the footnote of the section 3.2. Propagations of a single Ni corresponds to propagations of a single mass eigenstate with mass Mi and width Γi.…”

Section: Physical Interpretation Of the Regulatorsmentioning

confidence: 99%

“…It is why we call this contrition as "on-shell". 16 In the evolution equation of the lepton number, "off-shell" contributions can be interpreted as the interference terms in the (inverse)decay process of the superposition of different mass eigenstates.…”

Section: Physical Interpretation Of the Regulatorsmentioning

confidence: 99%

Kadanoff-Baym approach to the thermal resonant leptogenesis

Iso

Shimada

Yamanaka

2014

J. High Energ. Phys.

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Using the non-equilibrium Green function method (Kadanoff-Baym equations) in the expanding universe, we investigate evolution of the lepton number asymmetry when the right-handed (RH) neutrinos have almost degenerate massesThe resonantly enhanced CP -violating parameter ε i associated with the decay of the RH neutrino N i is obtained under an assumption that the off-diagonal component of the Yukawa coupling is smaller than the diagonal one. It is proportional to an enhancement factor (The result is consistent with the previous result obtained by Garny et al., in a constant background with an out-of-equilibrium initial state. We discuss the origin of such a regulator, and why it is not like R ij = M i Γ i − M j Γ j .

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“…Nevertheless, non-minimal seesaw models can be built, with m N ∼ 1 TeV or smaller, if some approximate flavor symmetry suppresses the ∼Y 2 v 2 /2m N contribution from the seesaw [448][449][450]. These models can also provide a successful leptogenesis (see, for instance, [451][452][453][454]). Heavy neutrinos with masses near the electroweak scale can be produced at the next generation of colliders (see [455] for a review) if their couplings to the SM fermions and gauge bosons is not too small, or through new non-standard interactions.…”

Section: New Leptons: Heavy Neutrinosmentioning

confidence: 99%

Collider aspects of flavor physics at high Q

Lari¹,

Pape²,

Porod³

et al. 2009

Flavor in the Era of the LHC

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This chapter of the "Flavor in the era of LHC" workshop report discusses flavor-related issues in the production and decays of heavy states at the LHC at high momentum transfer Q, both from the experimental and the theoretical perspective. We review top quark physics, and discuss the flavor aspects of several extensions of the standard model, such as supersymmetry, little Higgs models or models with extra dimensions. This includes discovery aspects, as well as the measurement of several properties of these heavy states. We also present publicly available computational tools related to this topic.

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A model for leptogenesis at the TeV scale

Cited by 30 publications

References 30 publications

Leptogenesis

Leptogenesis

Kadanoff-Baym approach to the thermal resonant leptogenesis

Collider aspects of flavor physics at high Q

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