arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.2132hep-exhep-ph
收藏

在KLOE-2上对Ks->pi 1 nu和Kl-> 3 pi 0的中性K介子系统T对称性的直接检验

A direct test of T symmetry in the neutral K meson system with Ks->pi l nu and Kl->3pi0 at KLOE-2

A. Gajos

摘要:

K介子和B介子的量子纠缠允许直接的时间反演对称性的实验测试独立于CP破坏。T对称性可以通过介子的味态和CP定态之间的可逆跃迁中的初态和终态的交换来探测,这些介子仅由T共轭连接。虽然BaBar实验成功地用中性B介子进行了这样的测试,但KLOE-2探测器可以通过研究Ks->pi 1 nu和Kl-> 3 pi 0衰变过程来探测中性K介子系统中的T破坏。对后者的分析是通过一种新的重建方法来促进的K1-> 3 pi 0衰变的顶点,其中只涉及中性粒子。这种新的顶点重建技术的细节,以及进行直接的T对称性测试在KLOE-2实验的前景。

英文摘要:

Quantum entanglement of K and B mesons allows for a direct experimental test of time-reversal symmetry independent of CP violation. The T symmetry can be probed by exchange of initial and final states in the reversible transitions between flavour and CP-definite states of the mesons which are only connected by the T conjugation. While such a test was successfully performed by the BaBar experiment with neutral B mesons, the KLOE-2 detector can probe T-violation in the neutral kaon system by investigating the process with Ks->pi l nu and Kl->3pi0 decays. Analysis of the latter is facilitated by a novel reconstruction method for the vertex of Kl->3pi0 decay which only involves neutral particles. Details of this new vertex reconstruction technique are presented as well as prospects for conducting the direct T symmetry test at the KLOE-2 experiment.

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。

↑