Investigation of $B_{u,d}\to (\pi, K) \pi$ decays within unparticle physics

TL;DR

This paper explores how unparticle physics could influence B meson decay processes, constraining unparticle parameters using mixing data, and potentially resolving certain experimental puzzles in decay rates and CP asymmetries.

Contribution

It provides a detailed analysis of unparticle effects on B decays, constraining unparticle parameters with mixing data and addressing decay rate discrepancies.

Findings

Unparticle parameters constrained by B mixing data.

Potential resolution of large B decay branching ratios.

Inability to fully explain certain CP asymmetries.

Abstract

We investigate the implication of unparticle physics on the B_{u,d}\to (\pi, K) \pi decays under the constraints of the B_{d,s}-\bar B_{d,s} mixing. We found that not only the unparticle parameters that belong to the flavor changing neutral current (FCNC) processes but also scaling dimension d_{\UP} could be constrained by the B_{d,s}-\bar B_{d,s} mixing phenomenology. Employing the minimum \chi^2 analysis to the B_{u,d}\to (\pi, K) \pi decays with the constraints of B_{d,s} mixing, we find that the puzzle of large branching ratio for B_{d}\to \pi^0 \pi^0 and the discrepancy between the standard model estimation and data for the direct CP asymmetry of B^+ \to K^+ \pi^0 and B_d \to \pi^+\pi^- can be resolved well. However, the mixing induced CP asymmetry of B_d\to K_S \pi^0 could not be well accommodated by the unparticle contributions.