Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations

Details Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations Constraints on Unparticle Interactions from Particle and Antiparticle Oscillations

2007-10-19

arxiv.org/abs/0710.3663v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 4 figures

Scientific paper

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 $\Gamma_{12}$, the unparticle may have sizeable contributions to both $M_{12}$ and $\Gamma_{12}$ 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 $x/y =\cot(\pi d_\U)$. 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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