Leptogenesis in cosmological relaxation with particle production
Leptogenesis in cosmological relaxation with particle production
复制标题
宇宙弛豫中的轻子发生与粒子产生
作者：
M. Son;Fang Ye;T. You
利用粒子产生来捕获弛豫子，改进了电弱尺度的宇宙学弛豫。我们结合联合收割机leptogenesis这样一个松弛模型，没有非常小的参数或大的e-折叠。扫描发生后，通货膨胀-现在允许在一个高尺度-在一个次普朗克弛豫场范围内的截止尺度的新物理高达O（100）TeV。由弛豫产生的粒子也使宇宙重新加热，并产生重子物质-反物质不对称。我们提出了一个实现，其中的平衡轻子，产生的弛豫，散射与热浴通过相互作用，违反CP和轻子数通过高维运营商。这样一个最小有效场论的设置，没有新的物理学低于截止，自然地将新的物理学联系起来，同时将轻子生成与弛豫粒子的产生联系起来;宇宙的重子不对称性因此可以内在地与弱尺度层次联系起来。
Cosmological relaxation of the electroweak scale is improved by using particle production to trap the relaxion. We combine leptogenesis with such a relaxion model that has no extremely small parameters or large e-foldings. Scanning happens after inflation—now allowed to be at a high scale—over a sub-Planckian relaxion field range for a cutoff scale of new physics up to O(100) TeV. Particle production by the relaxion also reheats the universe and generates the baryonic matter-antimatter asymmetry. We propose a realization in which out-of-equilibrium leptons, produced by the relaxion, scatter with the thermal bath through interactions that violate CP and lepton number via higher-dimensional operators. Such a minimal effective field theory setup, with no new physics below the cutoff, naturally decouples new physics while linking leptogenesis to relaxion particle production; the baryon asymmetry of the universe can thus be intrinsically tied to a weak scale hierarchy.