从粲重子或美重子的振荡研究重子生成
Baryogenesis from Oscillations of Charmed or Beautiful Baryons
摘要：
我们提出了一个模型CP违反振荡的中性，重口味的重子到反重子的速率是在几个数量级的寿命。重子违反的味结构抑制中子振荡和重子数违反核衰变实验允许的速率。我们还提出了一个方案，在早期宇宙中产生这样的重子通过一个中性粒子的平衡衰变，强子化后，但在核合成之前。我们发现参数CP违反重子振荡在几兆电子伏的温度可能会导致观察到的重子和反重子之间的不对称性。此外，重子生成的相关参数空间的一部分是潜在的测试在贝尔II通过衰变的重味重子到一个异国情调的中性费米子。该模型引入了四个新粒子：三个轻马约拉纳费米子和一个有色标量。这些费米子中最轻的通常在对撞机的时间尺度上寿命很长，可能是在底部强子和可能的粲强子的衰变中产生的。
英文摘要：
We propose a model for CP violating oscillations of neutral, heavy-flavored baryons into antibaryons at rates which are within a few orders of magnitude of their lifetimes. The flavor structure of the baryon violation suppresses neutron oscillations and baryon number violating nuclear decays to experimentally allowed rates. We also propose a scenario for producing such baryons in the early Universe via the out-of-equilibrium decays of a neutral particle, after hadronization but before nucleosynthesis. We find parameters where CP violating baryon oscillations at a temperature of a few MeV could result in the observed asymmetry between baryons and antibaryons. Furthermore, part of the relevant parameter space for baryogenesis is potentially testable at Belle II via decays of heavy flavor baryons into an exotic neutral fermion. The model introduces four new particles: three light Majorana fermions and a colored scalar. The lightest of these fermions is typically long lived on collider timescales and may be produced in decays of bottom and possibly charmed hadrons.
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