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Reheating and Supersymmetric Flat-Direction Baryogenesis
High Energy Physics - Phenomenology · Submitted 13 Jan 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In these cases we find that estimates for the resulting baryon/lepton asymmetry of the universe are substantially altered.
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The abstract, sentence by sentence
We re-examine Affleck-Dine baryo/leptogenesis from the oscillation of condensates along flat directions of the supersymmetric standard model, which attained large vevs at the end of inflationary epoque. The key observation is that superpotential interactions couple the flat directions to other fields, which acquire masses induced by the flat-direction vev that may be sufficiently small for them to be kinematically accessible to inflaton decay. The resulting plasma of inflaton decay products then may act on the flat directions via these superpotential Yukawa couplings, inducing thermal masses and supersymmetry-breaking A terms. In such cases the flat directions start their oscillations at an earlier time than usually estimated. The oscillations are also terminated earlier, due to evaporation of the flat direction condensate produced by its interaction with the plasma of inflaton decay products. In these cases we find that estimates for the resulting baryon/lepton asymmetry of the universe are substantially altered. We identify scenarios for the Yukawa couplings to the flat directions, and the order and mass scale of higher-dimensional superpotential interactions that set the initial flat direction vev, that might lead to acceptable baryo/leptogenesis.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We re-examine Affleck-Dine baryo/leptogenesis from the oscillation of condensates along flat directions of the supersymmetric standard model, which attained large vevs at the end of inflationary epoque. | contribution 0.58 | 0.65 | 0.05 | asserted 0.93 |
| s1 | The key observation is that superpotential interactions couple the flat directions to other fields, which acquire masses induced by the flat-direction vev that may be sufficiently small for them to be kinematically accessible to inflaton decay. | contribution 0.61 | 0.51 | 0.13 | hedged possibility 0.82 |
| s2 | The resulting plasma of inflaton decay products then may act on the flat directions via these superpotential Yukawa couplings, inducing thermal masses and supersymmetry-breaking A terms. | contribution 0.39 | 0.34 | 0.08 | hedged possibility 0.79 |
| s3 | In such cases the flat directions start their oscillations at an earlier time than usually estimated. | result 0.99 | 0.53 | 0.09 | asserted 0.91 |
| s4 | The oscillations are also terminated earlier, due to evaporation of the flat direction condensate produced by its interaction with the plasma of inflaton decay products. | result 0.98 | 0.62 | 0.10 | asserted 0.98 |
| s5 | In these cases we find that estimates for the resulting baryon/lepton asymmetry of the universe are substantially altered. | result 0.97 | 0.94 | 0.56 | asserted 1.00 |
| s6 | We identify scenarios for the Yukawa couplings to the flat directions, and the order and mass scale of higher-dimensional superpotential interactions that set the initial flat direction vev, that might lead to acceptable baryo/leptogenesis. | contribution 0.84 | 0.89 | 0.22 | speculative 0.47 |
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Original abstract
We re-examine Affleck-Dine baryo/leptogenesis from the oscillation of condensates along flat directions of the supersymmetric standard model, which attained large vevs at the end of inflationary epoque. The key observation is that superpotential interactions couple the flat directions to other fields, which acquire masses induced by the flat-direction vev that may be sufficiently small for them to be kinematically accessible to inflaton decay. The resulting plasma of inflaton decay products then may act on the flat directions via these superpotential Yukawa couplings, inducing thermal masses and supersymmetry-breaking A terms. In such cases the flat directions start their oscillations at an earlier time than usually estimated. The oscillations are also terminated earlier, due to evaporation of the flat direction condensate produced by its interaction with the plasma of inflaton decay products. In these cases we find that estimates for the resulting baryon/lepton asymmetry of the universe are substantially altered. We identify scenarios for the Yukawa couplings to the flat directions, and the order and mass scale of higher-dimensional superpotential interactions that set the initial flat direction vev, that might lead to acceptable baryo/leptogenesis.
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References
How the literature uses it
15 arXiv papers cite this in 18 sentences
Papers citing it · 14 sentences without a confident label
Cites it as support 1 paper
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Note that, for $n=6$, thermal effects [ref] play a negligible role in the AD dynamics, since, before reheating $T^4∼T_R^2 H M_P$ (for constant inflaton decay width), and hence $ϕ/T∼(M^3/T_R^2M_P)^1/4≫1$.
Comparable dark matter and baryon abundances with a heavy dark sector · Introduction · 0.96
Cites it as background 3 papers
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We note that, following the majority of work in this field, we will ignore A-term contributions ( U(1) violation terms), thermal effects [ref] which come from the interactions between the AD field and the decay products of the inflaton, and the Hubble-induced terms which gives a negative mass-squared contribution during inflation.
Q-balls in flat potentials · Gravity-mediated potentials · 0.81
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The formed condensate can have several cosmological implications: In the presence of phase dependent potential terms, the flat directions may source a finite baryon number density through the Affleck-Dine mechanism [ref] .
Non-perturbative decay of udd and QLd flat directions · Introduction · 0.94
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Their cosmological consequences may include dark-matter production [ref] , primordial magnetogenesis [ref] , baryogenesis [ref] , modifications to the equation of state after inflation and to cosmic microwave background (CMB) observables [ref] , and potentially observable gravitational-wave backgrounds [ref] .
CosmoLattice 2.0 · Discussion · 0.82
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