论文标题
带有Majorana fermion对耦合到夸克的有效理论
Effective Theory for Baryogenesis with a Majorana Fermion Pair Coupled to Quarks
论文作者
论文摘要
为了解释观察到的宇宙的重骨不对称性，我们通过添加矢量矢量尺寸六个尺寸（SM）来扩展标准模型（SM），将有效的操作员耦合，将新的Dirac Fermion $χ$耦合，在Sm Gauge对称性下未充电，但在Baryon号码下收取的Quark Like Ferm-Ferm-ferm-ferm-ferm-ferm-ferm-ferm-ferm-typial-tynical typical-tynical and-form-nevely and oppersmemerties and-sm eguge insorties and-smeguge semperies and comploce。我们通过将Majorana群众添加到$χ$来引入Baryon数字违规，这将Dirac Fermion分为两个Majorana Fermions，并具有不平等的群众。我们通过考虑一些紫外线完成示例，推测有效运营商，Majoraana质量和与SM的新物理部门的联系。除了违反重子数字外，我们还表明，该理论中可能会违反$ c $和$ cp $的侵害，并且树木和环路振幅与壳中间状态的干扰可能会导致$χ$衰减和散射过程中的baryon不对称。我们在早期宇宙中写下了结合了衰减和散射的重子不对称的早期宇宙中的玻尔兹曼方程。我们为产生的重子不对称和中子抗抗震动速率提供了数值估计值。
With a goal toward explaining the observed baryon asymmetry of the Universe, we extend the standard model (SM) by adding a vector-vector dimension-six effective operator coupling a new Dirac fermion $χ$, uncharged under the SM gauge symmetries but charged under baryon number, to a quark-like up-type fermion and two identical down-type fermions. We introduce baryon number violation by adding Majorana masses to $χ$, which splits the Dirac fermion into two Majorana fermions with unequal masses. We speculate on the origin of the effective operator, the Majorana mass, and the new physics sector connection to the SM, by considering some ultraviolet completion examples. In addition to the baryon number violation, we show that $C$ and $CP$ invariances can be violated in the theory, and the interference between tree and loop amplitudes with on-shell intermediate states can lead to a baryon asymmetry in $χ$ decay and scattering processes. We write down the Boltzmann equation for baryon number in the early Universe incorporating the decay and scattering baryon asymmetries. We provide numerical estimates for the baryon asymmetry generated, and for the neutron-antineutron oscillation rate.
