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arXiv 1507.04459hep-ph
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重子三体衰变中可能的大$CP$破坏

Possible large $CP$ violation in three body decays of heavy baryon

Zhen-Hua Zhang, Chao Wang, Xin-Heng Guo

摘要:

我们提出了一种新的机制,它可以在重子三体衰变的相空间中引入大的$CP$不对称性。在这种机制中,一个大的$CP$不对称性是由两个中间共振的干涉引起的,这两个中间共振随后衰减成两种不同的最终粒子组合。我们将这一机制应用到衰变通道$Λ_b^0 \to p π^0π^-$中,发现在相空间的干涉区域中,差分$CP$不对称性可以达到$50\%$那么大,而区域$CP$不对称性可以达到$16\%$那么大.

英文摘要:

We propose a new mechanism which can introduce large $CP$ asymmetries in the phase spaces of three-body decays of heavy baryons. In this mechanism, a large $CP$ asymmetry is induced by the interference of two intermediate resonances, which subsequently decay into two different combinations of final particles. We apply this mechanism to the decay channel $Λ_b^0 \to p π^0π^-$, and find that the differential $CP$ asymmetry can reach as large as $50\%$, while the regional $CP$ asymmetry can reach as large as $16\%$ in the interference region of the phase space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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