Unparticle phase effects

TL;DR

This paper explores how unparticle phases influence CP violation and decay processes in B mesons, revealing significant effects on CP asymmetries, differential branching ratios, and forward-backward asymmetries, with results aligning with experimental data.

Contribution

It demonstrates the impact of unparticle phases on CP violation and decay observables in B meson processes, providing novel insights into unparticle effects without considering strong QCD phases.

Findings

Unparticle phases significantly affect direct CP asymmetries in B decays.

Unparticles enhance the differential branching ratio of b→s l+ l− at low invariant mass.

Unparticles influence forward-backward asymmetries in b→s l+ l− decays.

Abstract

Unparticles proposed by Georgi carry CP conserving phases in their propagators. We demonstrate that these peculiar phases have an important impact on CP violation. Without including the strong QCD phases, we study the unparticle phase effects on the direct CP asymmetries in the exclusive decays of $\bar B_d\to \pi^{+} \pi^{-}$ and $B\to \pi K$, in which the flavor changing neutral currents are forbidden at tree level but induced by one-loop diagrams. Interesting and consistent results comparing to the data are obtained. In addition, we find that unparticles will significantly enhance the differential branching ratio of $b\to s \ell^{+} \ell^{-}$ at the small invariant mass of $\ell^{+} \ell^{-}$. The forward-backward asymmetries for $b\to s \ell^{+} \ell^{-}$ due to unparticles are also explored.