Unparticle physics effects on D0-(D0)over bar mixing

The mixing of K-0-(K-0) over bar, D-0-(D-0) over bar and B-(s)(0)-<(B)((s))(0)over bar> provides a sensitive probe to explore new physics beyond the Standard Model. The scale can induce flavor-changing neutral current and contribute to the mixing at tree level. We invariant unparticle physics recently proposed by Georgi investigate the unparticle effects on B-0-(B-0) over bar and D-0-(D-0) over bar mixing. Especially, the newly observed D-0-D-0 mixing sets the most stringent constraints on the coupling of the unparticle to quarks. (c) 2007 Elsevier B.V. All rights reserved.