High Energy Physics - Phenomenology · arXiv:hep-ph/0308031 v2 · submitted 4 Aug 2003
Soft Leptogenesis
The paper says
“The mechanism is successful if the lepton-violating soft bilinear coupling is unconventionally (but not unnaturally) small.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
We study “soft leptogenesis”, a new mechanism of leptogenesis which does not require flavour mixing among the right-handed neutrinos. Supersymmetry soft-breaking terms give a small mass splitting between the CP-even and CP-odd right-handed sneutrino states of a single generation and provide a CP-violating phase sufficient to generate a lepton asymmetry. The mechanism is successful if the lepton-violating soft bilinear coupling is unconventionally (but not unnaturally) small. The values of the right-handed neutrino masses predicted by soft leptogenesis can be low enough to evade the cosmological gravitino problem.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 0.88
What the abstract itself states, as probabilities: claims first 0.12 · states limitation 0.82 · human participants 0.01 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.07 · compares with prior results 0.27 · mentions code or data availability 0.01
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| We study ``soft leptogenesis'', a new mechanism of leptogenesis which does not require flavour mixing among the right-handed neutrinos. | contribution 0.99 | 0.72 | 0.16 | asserted 0.95 |
| Supersymmetry soft-breaking terms give a small mass splitting between the CP-even and CP-odd right-handed sneutrino states of a single generation and provide a CP-violating phase sufficient to generate a lepton asymmetry. | method 0.66 | 0.48 | 0.30 | asserted 1.00 |
| The mechanism is successful if the lepton-violating soft bilinear coupling is unconventionally (but not unnaturally) small. | limitation 0.54 | 0.66 | 0.24 | asserted 0.88 |
| The values of the right-handed neutrino masses predicted by soft leptogenesis can be low enough to evade the cosmological gravitino problem. | result 0.53 | 0.74 | 0.15 | hedged possibility 0.59 |
What kind of paper the classifier reports this is: theoretical result 0.91 · evidence from argument 0.53
What was examined, and what was not
Sources read
- arXiv listing abstract v2
Not examined
- full text
- figures and tables
- references and citing sentences
- relations to other papers
Levels run
- P abstract
Not run
- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,641 input tokens, $0.0002 reported.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 4 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis hep-ph · Apr 2014
- Effective Theory of Resonant Leptogenesis in the Closed-Time-Path Approach hep-ph · Dec 2011
- Quantum Boltzmann Equations and Leptogenesis hep-ph · Mar 2007
- Leptogenesis: beyond the minimal type I seesaw scenario hep-ph · Dec 2012
How the literature uses it
25 arXiv papers cite this in 89 sentences
Papers citing it · 62 sentences without a confident label
Uses its method or tool 3 papers
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Using the resummation approach for unstable particle propagators described in [ref] , the one-loop amplitude for the sneutrino decays $_i'→a_α$, with $a_α= _αH_u$ or $L_α_u$ is 𝒜̂^a_α_i = A_i^a_α - i ∑_j≠i A_j^a_α Σ^_ji/p^2-M_j^2+iΣ^_jj In this expression, $A_i^a_α$ is the tree-level amplitude of the $_i'→a_α$ decay and $Σ_ji^$ is the absorptive part of the $_i'→_j'$ self-energy, which we evaluated with the Cutkosky rules [ref] .
PeV-scale leptogenesis, gravity waves and black holes from a SUSY-breaking phase transition · CP asymmetry · 0.99
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In this section we recompute the asymmetry using a quantum mechanical (QM) approach, based on an effective (non hermitic) Hamiltonian [ref] .
On Gaugino Contributions to Soft Leptogenesis · CP Asymmetry in Quantum Mechanics · 0.88
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One possibility, which was used in [ref] and [ref] , is to neglect all the thermal corrections except for the ones that are crucial to get a non vanishing CP asymmetry, which are evaluated in the approximation of decay at rest of the heavy sneutrinos.
On the full Boltzmann equations for Leptogenesis · Approximated Boltzmann Equations · 0.98
Uses its data or values 1 paper
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The maximum value of $η$ is $𝒪(0.1)$ for $m_1 ≃10^-(3-4)eV$ [ref] , where [equation] and $v=174 GeV$ is the vacuum expectation value of Higgs.
Soft Leptogenesis and Gravitino Dark Matter in Gauge Mediation · Soft Leptogenesis · 0.81
Compares with it 5 papers
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This agrees with [ref] .
The (ir)Relevance of Initial Conditions in Soft Leptogenesis · Lepton Asymmetries · 0.96
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We also note that while the usual soft leptogenesis done in the MSSM [ref] , to the leading order in soft terms ($M^2≪M_1^2, A_N^2≪M_1^2$), necessarily requires thermal phase space factors for the final state bosons ($c_B$) and fermions ($c_F$) to have $ε∝Δ_BF=c_B-c_F/c_B+c_F$, we get an asymmetry even without thermal mass corrections to the decay products at the leading order in soft terms.
Soft leptogenesis in the NMSSM with a singlet right-handed neutrino superfield · $Ñ$ decays · 1.00
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This is to be contrasted with the standard case of soft leptogenesis where bosonic and fermionic decay channels have opposite CP asymmetry and leptogenesis requires thermal effects to avoid exact cancellation between them [ref] .
PeV-scale leptogenesis, gravity waves and black holes from a SUSY-breaking phase transition · CP asymmetry · 1.00
Cites it as background 12 papers
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Soft leptogenesis [ref] is an attractive way of generating baryon asymmetry.
Soft Leptogenesis and Gravitino Dark Matter in Gauge Mediation · Introduction · 0.91
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As stated above, in this work we consider the Soft Leptogenesis scenario [ref] , which employs the minimal supersymmetric standard model plus singlet neutrino chiral superfields.
The (ir)Relevance of Initial Conditions in Soft Leptogenesis · Definitions and Approximations · 0.88
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This allows for a different leptogenesis scenario that is specific to supersymmetry known as `soft leptogenesis' [ref] .
Early Universe effective theories: The Soft Leptogenesis and R-Genesis Cases · Soft leptogenesis: review and motivations · 0.80
Challenges and discussion
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