Unparticle physics effects on D0-D0¯ mixing

The mixing of K0-K0¯, D0-D0¯ and B(s)0-B(s)0¯ 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 B0-B0¯ and D0-D0¯ mixing. Especially, the newly observed D0-D0¯ mixing sets the most stringent constraints on the coupling of the unparticle to quarks.