Constraining unparticle physics with CP violation in Cabibbo-favored decays of D mesons

摘要

According to the standard model, the Cabibbo-favored (CF) decays are CP conserved at tree level. Observation of any finite CP asymmetry can be received as a signal of new physics. In CF charm meson decays, D~0→ K~-π~+ and D~+ → K_s~0π~+, the following experimental values for their CP asymmetry are reported, respectively: (0.3 ± 0.7)% and (-0.41 ± 0.09)%. The value of the later can be attributed to the mixing of K~0 and K~0, however, its contribution is about (-0.332 ± 0.006)%. In this paper, we use these experimental results to constrain the unparticle stuff as a new physics which may contribute to these CP asymmetries.