Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-05-13
Phys.Lett.B651:380-383,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, some errors corrected, published version
Scientific paper
10.1016/j.physletb.2007.06.045
The mixing of $K^0-\bar{K^0}$, $D^0-\bar{D^0}$ and $B_{(s)}^0-\bar{B^0_{(s)}}$ provides a sensitive probe to explore new physics beyond the Standard Model. The scale invariant unparticle physics recently proposed by Georgi can induce flavor-changing neutral current and contribute to the mixing at tree level. We investigate the unparticle effects on $B^0-\bar{B^0}$ and $D^0-\bar{D^0}$ mixing. Especially, the newly observed $D^0-\bar{D^0}$ mixing sets the most stringent constraints on the coupling of the unparticle to quarks.
Li Xue-Qian
Wei Zheng-Tao
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