arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.2598hep-ph
收藏

中微子束对味对角洛伦兹破坏的约束

Neutrino Beam Constraints on Flavor-Diagonal Lorentz Violation

Brett Altschul

摘要:

在第二代轻子动力学中,各向同性和洛伦兹增强不变性的破坏将导致带电π介子寿命的方向依赖性变化。这将使通过π衰变产生的中微子束的强度成为束方向的函数。这种现象的实验特征--下游中微子探测器事件速率的恒星变化--已经在寻找洛伦兹破坏的中微子振荡中进行了研究。MINOS近探测器数据的现有分析可以用来将影响μ子中微子速度的味道对角洛伦兹破坏系数限制在大约10^(-5)水平。

英文摘要:

Breaking of isotropy and Lorentz boost invariance in the dynamics of second-generation leptons would lead to direction-dependent changes in the lifetimes of charged pions. This would make the intensity of a neutrino beam produced via pion decay a function of the beam orientation. The experimental signature of this phenomenon--sidereal variations in the event rate at a downstream neutrino detector--has already been studied, in searches for Lorentz-violating neutrino oscillations. Existing analyses of MINOS near detector data can be used to constrain the flavor-diagonal Lorentz violation coefficients affecting muon neutrino speeds at roughly the 10^(-5) level.

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。

↑