Unparticle physics on direct CP violation

TL;DR

This paper investigates how unparticle physics, with its unique CP-conserving phases, significantly influences direct CP violation in B meson decays, potentially leading to observable effects in experiments.

Contribution

It demonstrates that unparticle physics can produce large direct CP asymmetries in B decays, a feature not achievable by other models, and suggests experimental probes for these phases.

Findings

Unparticle phases can induce CP asymmetries up to 15% in B decays.

Unparticle effects significantly alter CP violation observables.

T-odd correlations in B decays can probe unparticle phases.

Abstract

The effects of the peculiar CP conserving phases in unparticle propagators are explored. We find that the phases have a great impact on CP-violation. We adopt the decays $B_{d}\to \pi^{+} \pi^{-}$ and $B_{d}\to \ell^{-}\ell^{+}$ as the illustrators to demonstrate the influences of these phases on the direct CP asymmetries. In particular, we emphasize that unparticle physics is the only model suggested to date that could give the direct CP asymmetries in $B_d\to \ell^{-} \ell^{+}$ as large as 15%. We also point out that the unparticle phases could be probed in $B\to K^* \ell^{+} \ell^{-}$ decays by using T-odd correlations.