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arXiv 0710.3663hep-ph
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粒子和反粒子振荡对非粒子相互作用的限制

Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations

Shao-Long Chen, Xiao-Gang He, Xue-Qian Li, Ho-Chin Tsai, Zheng-Tao Wei

摘要:

本文研究了介子-反介子和介子-反介子系统中粒子和反粒子振荡的非粒子效应。不同于通常的树级贡献介子振荡的重粒子交换与小$Γ_{12}$,非粒子可能有相当大的贡献$M_{12}$和$Γ_{12}$由于分数维的非粒子$d_\U$。我们发现,可以得到非常严格的约束非粒子和粒子的相互作用。如果非粒子效应对介子混合参数$x$和$y$的贡献占主导地位(这可能发生在$D^0-\bar D^0$混合中),我们发现$x/y =\cot(πd_\U)$。有趣的约束unparticle和粒子的相互作用也可以得到使用muonion和antimuonion振荡数据。本文还评述了介子振荡中非粒子效应对CP破坏的影响。

英文摘要:

We study unparticle effects on particle and antiparticle osillations in meson-antimeson, and muonium-antimuonium systems. Unlike usual tree level contributions to meson oscillations from heavy particle exchange with small $Γ_{12}$, the unparticle may have sizeable contributions to both $M_{12}$ and $Γ_{12}$ due to fractional dimension $d_\U$ of the unparticle. We find that very stringent constraints on the unparticle and particle interactions can be obtained. If unparticle effect dominates the contributions (which may happen in $D^0-\bar D^0$ mixing) to meson mixing parameters $x$ and $y$, we find that $x/y =\cot(πd_\U)$. Interesting constraints on unparticle and particle interactions can also be obtained using muonion and antimuonion oscillation data. We also comment on unparticle effects on CP violation in meson oscillations.

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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