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27 April 2024 |
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Article overview
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Constraints on Unparticle Interactions from Particle and Antiparticle Oscillation | | Shao-Long Chen
; Xiao-Gang He
; Xue-Qian Li
; Ho-Chin Tsai
; Zheng-Tao Wei
; | | Date: |
19 Oct 2007 | | 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
$Gamma_{12}$, 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 $D^0-ar D^0$ 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. | | Source: | arXiv, 0710.3663 | | Services: | Forum | Review | PDF | Favorites | |
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