论文标题
探测Charmed Baryon衰减中的Hyperon CP违规
Probing hyperon CP violation from charmed baryon decays
论文作者
论文摘要
Baryon部门中的CP违规（CPV）尚未通过实验建立。在这项工作中，我们建议通过涉及最终状态中的超子（例如$λ_c^+\toλ^0π^0π^0π^+，λ^0 \ topπ^ - $）来搜索涉及超子的cabibbo魅力 - 巴里昂腐烂过程。超子衰减的CPV纯粹在这些链过程中揭示了，因为在标准模型（SM）中，Cabibbo最喜欢的魅力衰减中的CPV消失了。超子在弱魅力衰减中是极化的，因此我们可以通过角分布来测量Lee-Yang不对称参数$α$，然后可以测量$α$诱导的CPV。可以发现，Belle II和LHCB可以在不久的将来达到Hyperon CPV的SM预测。
CP violation (CPV) in the baryon sectors has not yet been established experimentally. In this work, we propose to search for the hyperon CPV through the Cabibbo-favored charm-baryon decaying processes involving a hyperon in the final states, such as $Λ_c^+\to Λ^0π^+, Λ^0\to pπ^-$. The CPV of the hyperon decays are purely revealed in these chain processes, since the CPV in the Cabibbo-favored charm decays are vanishing in the Standard Model (SM). The hyperons are polarized in the weak charm decays, so that we can measure the Lee-Yang asymmetric parameter $α$ by the angular distributions, and then can measure the $α$-induced CPV. It can be found that it is accessible for Belle II and LHCb to reach the SM prediction of the hyperon CPV in the near future.
