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arXiv 1308.2602hep-ph
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弱扇区Lorentz破坏对π介子衰变的贡献

Contributions to Pion Decay from Lorentz Violation in the Weak Sector

Brett Altschul

摘要:

弱扇区中的洛伦兹破坏会影响π介子的β衰变寿命。衰减幅度可以呈现各向异性,但是只有增强不变性的各向同性违反可以影响质心帧中的净寿命。然而,由于在费米实验室产生NuMI中微子束的π介子的静止坐标系随地球的旋转而变化,因此可以使用MINOS近探测器事件率的恒星变化的先前分析来约束各向异性洛伦兹破坏。由此得到的弱扇区洛伦兹破坏的边界在10^(-4)水平,这比以前的结果有很大的改进。所涉及的π介子的高度相对论性是造成这种改进的原因。

英文摘要:

Lorentz violation in the weak sector would affect the beta-decay lifetimes of pions. The decay amplitude may be rendered anisotropic, but only an isotropic violation of boost invariance can affect the net lifetime in the center of mass frame. However, since the rest frames of the pions that produce the NuMI neutrino beam at Fermilab vary with the rotation of the Earth, it is possible to constrain anisotropic Lorentz violation using prior analyses of sidereal variations in the event rate at the MINOS near detector. The resulting bounds on weak-sector Lorentz violation are at the 10^(-4) level, a substantial improvement over previous results. The highly relativistic character of the pions involved is responsible for the improvement.

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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