Study $B^{0}_{(s)}$ decays into $\phi$ and a scalar or vector meson

TL;DR

This paper investigates $B^{0}_{s}$ and $B^{0}$ decays into $ ightarrow ext{phi}$ and two mesons using a chiral unitary approach, successfully describing experimental data and predicting branching ratios for related decay channels.

Contribution

It applies the chiral unitary approach to analyze $B$ meson decays, incorporating final state interactions and coupled channels, providing new insights into resonance contributions and decay distributions.

Findings

The $B^{0}_{s} ightarrow ightarrow ext{phi} ext{pi}^+ ext{pi}^-$ decay matches experimental data up to 1 GeV.

Significant contributions from $f_{0}(500)$ and $f_{0}(980)$ resonances in the decay distributions.

Predicted branching ratios for other decay channels are consistent with existing experimental data within uncertainties.

Abstract

In the present work, we investigate the decays of $B^{0}_{s} \rightarrow \phi\pi^{+}\pi^{-}$ and $B^{0} \rightarrow \phi\pi^{+}\pi^{-}$ with the final state interactions based on the chiral unitary approach. In the final state interactions of the $\pi^+\pi^-$ with its coupled channels, we study the effects of the $\eta\eta$ channel in the two-body interactions for the reproduction of the $f_{0}(980)$ state. Our results for the $\pi^+\pi^-$ invariant mass distributions of the decay $B^{0}_{s} \rightarrow \phi\pi^{+}\pi^{-}$ describe the experimental data up to 1 GeV well, with the resonance contributions from the $f_{0}(980)$ and $\rho$. For the predicted invariant mass distributions of the $B^{0} \rightarrow \phi\pi^{+}\pi^{-}$ decay, we found that the contributions from the $f_{0}(500)$ are significant except for the ones from the $f_{0}(980)$ state. With some experimental branching ratios as input to determine the production vertex factors, we make some predictions for the branching ratios of the other final decay channels, including the vector mesons, in the $B^0_{(s)}$ decays, where some of them are consistent with the experimental ones within the uncertainties.