论文标题
对原始Lepton风味不对称的新约束
A new constraint on primordial lepton flavour asymmetries
论文作者
论文摘要
早期宇宙中存在的手性化学潜力可以通过手性血浆不稳定性来源。如果这些高磁场生存到电牵引相变为electroweak相变，它们为宇宙的重子不对称提供了贡献。在这封信中，我们证明了Lepton风味不对称$ |/T \ SIM 9 \ TIMES 10^{ - 3} $触发此机制，即使消失了Lepton的总数。这不包括在高于$ 10^6 $ GEV的温度下存在如此大的Lepton风味不对称的可能性，这设置了一个约束，该限制比当前的CMB和BBN限制强两个数量级。
A chiral chemical potential present in the early universe can source helical hypermagnetic fields through the chiral plasma instability. If these hypermagnetic fields survive until the electroweak phase transition, they source a contribution to the baryon asymmetry of the universe. In this letter, we demonstrate that lepton flavour asymmetries above $|μ|/T \sim 9 \times 10^{-3}$ trigger this mechanism even for vanishing total lepton number. This excludes the possibility of such large lepton flavour asymmetries present at temperatures above $10^6$ GeV, setting a constraint which is about two orders of magnitude stronger than the current CMB and BBN limits.
