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arXiv · 0710.3663

Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations

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

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.

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Shao-Long Chen, Xiao-Gang He, Xue-Qian Li, Ho-Chin Tsai, Zheng-Tao Wei. 2007-10-19. Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations. https://doi.org/10.1140/epjc%2Fs10052-008-0823-z

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