论文标题
使宇宙在20 MEV
Making the Universe at 20 MeV
论文作者
论文摘要
我们提出了一种低尺度的男性生成和暗物质产生的可检验机制，在该机制中均未违反Baryon和Lepton数量。收费的$ d $介子是在数十MEV温度下产生的平衡。 $ d $介子很快就会发生CP侵入式腐烂，后者将其腐烂成黑暗扇区的瘦素，而不会违反Lepton数字。为了将这种Lepton的不对称性转移到Baryon的不对称性中，深色Leptons散布在Lepton和Baryon数字下的其他深色扇区状态上。有趣的是，这种转移在没有electroweak sphalerons的情况下进行，在这种低尺度上不再活跃。我们提出了两个示例模型，可以实现此转移，同时保持与当前限制保持一致。当前允许的$ D $梅森腐烂中，所需的CP违反金额将由山脉探测。此外，PIERU和PSI实验的限制了带电旋转对黑暗扇形瘦素的相关衰减，并将在即将进行的实验中进一步探索。
We present a testable mechanism of low-scale baryogenesis and dark matter production in which neither baryon nor lepton number are violated. Charged $D$ mesons are produced out-of-equilibrium at tens of MeV temperatures. The $D$ mesons quickly undergo CP-violating decays to charged pions, which then decay into dark-sector leptons without violating lepton number. To transfer this lepton asymmetry to the baryon asymmetry, the dark leptons scatter on additional dark-sector states charged under lepton and baryon number. Amusingly, this transfer proceeds without electroweak sphalerons, which are no longer active at such low scales. We present two example models which can achieve this transfer while remaining consistent with current limits. The required amount of CP violation in charged $D$ meson decays, while currently allowed, will be probed by colliders. Additionally, the relevant decays of charged pions to dark-sector leptons have been constrained by the PIENU and PSI experiments and will be further explored in upcoming experiments.
