调和膨胀与Festina Lente界：通过Affleck-Dine重子生成
Reconciling Inflation with the Festina Lente Bound through Affleck-Dine Baryogenesis
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中文总结 AI 辅助
本文通过膨胀期间完全打破规范对称性来规避Festina-Lente界，并在MSSM中分类完全打破规范群的平坦方向，证明其凝聚体可经Affleck-Dine机制产生重子不对称性，且满足FL界。
中文摘要 AI 辅助
Festina-Lente界是一个沼泽地猜想，其动机源于dS时空中带电黑洞的行为，它对带电粒子的质量施加了约束。尽管该约束在当前宇宙中相对较弱，但它可能严重限制膨胀。我们澄清了其基本假设，并表明在膨胀期间打破所有规范对称性，且规范玻色子质量高于哈勃尺度，为规避这些约束提供了一种自然途径。我们列举了最小超对称标准模型中完全打破其连续规范群的单一平坦方向，以及仅在两个方向同时激发并满足F-平坦和D-平坦条件时才能实现完全打破的方向对。通过适当的提升算子，这些凝聚体还可以通过Affleck-Dine机制产生重子不对称性。在此分类中，所有允许完全打破的单一方向单项式都带有非零的$B-L$，为Affleck-Dine重子生成提供了候选者。我们进一步表明，在这种设置下，与观测到的重子不对称性和等曲率约束相容的大凝聚体很容易满足Festina-Lente界，从而在FL界与Affleck-Dine重子生成之间建立了自然联系。
英文摘要
The Festina-Lente bound is a swampland conjecture motivated by the behavior of charged BHs in dS spacetime, which imposes a constraint on the masses of charged particles. Although relatively weak in the present-day Universe, it can severely constrain inflation. We clarify its underlying assumptions and show that breaking all gauge symmetries during inflation, with gauge boson masses above the Hubble scale, provides a natural way to evade these constraints. We catalogue single flat directions in the Minimal Supersymmetric Standard Model that completely break its continuous gauge group, together with pairs that achieve complete breaking only when both directions are excited and simultaneously satisfy F- and D-flatness. With suitable lifting operators, such condensates can also generate the baryon asymmetry through the Affleck-Dine mechanism. Within this classification, all single-direction monomials that admit complete breaking carry nonzero $B-L$, providing candidates for Affleck-Dine baryogenesis. We further show that, in this setting, a large condensate compatible with the observed baryon asymmetry and isocurvature constraints readily satisfies the Festina-Lente bound, establishing a natural connection between the FL bound and Affleck-Dine baryogenesis.
发表机构
- Department of Physics, Tohoku University（东北大学物理系）
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