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Non-thermal leptogenesis via direct inflaton decay without SU(2)(L) triplets
High Energy Physics - Phenomenology · Submitted 23 Mar 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We show that the former is viable, whereas the latter is ruled out.
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The abstract, sentence by sentence
We present a non-thermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and inflaton decay to heavy right-handed neutrino superfields is kinematically disallowed, or the right-handed neutrinos which can be decay products of the inflaton are unable to generate sufficient baryon asymmetry via their subsequent decay. The primordial lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with exchange of different right-handed neutrinos. The mechanism requires superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial asymmetry. We consider two models, one without and one with SU(2)(R) gauge symmetry. We show that the former is viable, whereas the latter is ruled out. Although the broken R-parity need not have currently observable low-energy signatures, some R-parity-violating slepton decays may be detectable in the future colliders.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We present a non-thermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and inflaton decay to heavy right-handed neutrino superfields is kinematically disallowed, or the right-handed neutrinos which can be decay products of the inflaton are unable to generate sufficient baryon asymmetry via their subsequent decay. | contribution 0.86 | 0.42 | 0.07 | asserted 0.97 |
| s1 | The primordial lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with exchange of different right-handed neutrinos. | method 0.70 | 0.72 | 0.21 | asserted 1.00 |
| s2 | The mechanism requires superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. | method 0.86 | 0.46 | 0.05 | asserted 1.00 |
| s3 | We take into account the constraints from neutrino masses and mixing and the preservation of the primordial asymmetry. | method 0.77 | 0.86 | 0.03 | asserted 0.93 |
| s4 | We consider two models, one without and one with SU(2)(R) gauge symmetry. | method 0.53 | 0.87 | 0.04 | asserted 0.94 |
| s5 | We show that the former is viable, whereas the latter is ruled out. | result 1.00 | 0.93 | 0.55 | asserted 1.00 |
| s6 | Although the broken R-parity need not have currently observable low-energy signatures, some R-parity-violating slepton decays may be detectable in the future colliders. | interpretation 0.88 | 0.49 | 0.05 | hedged possibility 1.00 |
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Original abstract
We present a non-thermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and inflaton decay to heavy right-handed neutrino superfields is kinematically disallowed, or the right-handed neutrinos which can be decay products of the inflaton are unable to generate sufficient baryon asymmetry via their subsequent decay. The primordial lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with exchange of different right-handed neutrinos. The mechanism requires superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial asymmetry. We consider two models, one without and one with SU(2)(R) gauge symmetry. We show that the former is viable, whereas the latter is ruled out. Although the broken R-parity need not have currently observable low-energy signatures, some R-parity-violating slepton decays may be detectable in the future colliders.
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2 arXiv papers cite this in 2 sentences
Papers citing it · 1 sentence without a confident label
Cites it as background 1 paper
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For example, non-thermal leptogenesis is discussed in supersymmetric hybrid inflation models [ref] , chaotic inflation [ref] , hilltop inflation [ref] , Coleman-Weinberg potential [ref] , supersymmetric SO($10$) models [ref] , and various neutrino models [ref] .
Towards a systematic study of non-thermal leptogenesis from inflaton decays · Introduction · 0.92
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