论文标题
早期宇宙中自发性CP违规的男性生成
Baryogenesis from spontaneous CP violation in the early Universe
论文作者
论文摘要
我们提出了一种电动尺度的男性生成变体，其特征在于由CP-ODD标量的真空期望值驱动的早期宇宙中电荷 - 偏度（CP）对称性的自发破坏。早期宇宙中的CP破裂时期将以Electroweak相变的结尾，目前CP是（大约）保守的，因此避免了严格的电偶极矩实验限制在超越标准的CP违规源。我们通过非最小希格斯部门的明确实现，该扇区由两个希格斯双重组和一个单元伪库斯卡（2hdm + $ a $）组成。我们分析了2HDM + $ a $参数空间的区域，在这种情况下发生了如此早期的CP违规时期，并表明所需的热史和成功的男性生成会导致预测性情况，可以通过LHC搜索和低能性风味测量的结合来测试。
We propose a variant of electroweak-scale baryogenesis characterized by the spontaneous breaking of the charge-parity (CP) symmetry in the early Universe driven by the vacuum expectation value of a CP-odd scalar. This CP breaking period in the early Universe would be ended by the electroweak phase transition, with CP being (approximately) conserved at present, thus avoiding the stringent electric dipole moment experimental constraints on beyond-the-Standard-Model sources of CP violation. We study an explicit realization via a non-minimal Higgs sector consisting of two Higgs doublets and a singlet pseudoscalar (2HDM + $a$). We analyze the region of the 2HDM + $a$ parameter space where such an early Universe period of CP violation occurs, and show that the required thermal history and successful baryogenesis lead to a predictive scenario, testable by a combination of LHC searches and low-energy flavour measurements.
