Study of Ds+→K+K−π+ decay

Zhong-Yu Wang,Zhi-Feng Sun,Jing-Yu Yi,C W Xiao

doi:10.1103/physrevd.105.016025

Zhong-Yu Wang, Zhi-Feng Sun + Show 2 more

Open Access

https://doi.org/10.1103/physrevd.105.016025

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Abstract

We investigate the $D_{s}^{+} \rightarrow K^{+} K^{-} \pi^{+}$ decay theoretically with the final state interactions, which is based on the chiral unitary approach and takes into account the external and internal $W$-emission mechanisms at the quark level. Only considering three resonances contributions, the $f_0(980)$ in $S$-wave, the $\bar {K}^{*}(892)^{0}$ and $\phi(1020)$ in $P$-wave, one can make a good description of the recent experimental data from BESIII Collaboration, where the contribution from $S$-wave is found to be small. Besides, we also make a calculation of the corresponding branching fractions, which are consistent with the results of BESIII Collaboration and Particle Data Group.

Highlights

The weak decays of heavy mesons have drawn much attention in experiments for understanding the hadronic decay properties and the resonance productions of the decay processes
We investigate the Dþs → KþK−πþ decay theoretically with the final state interactions, which is based on the chiral unitary approach and takes into account the external and internal W-emission mechanisms at the quark level
We make a calculation of the corresponding branching fractions, which are consistent with the results of the BESIII Collaboration and Particle Data Group

Summary

INTRODUCTION

The weak decays of heavy mesons have drawn much attention in experiments for understanding the hadronic decay properties and the resonance productions of the decay processes. [29] proposed an internal W-emission mechanism to explain the process Dþs → πþπ0η, where the resonances a0ð980Þþ and a0ð980Þ0 were dynamically generated utilizing the coupled channel interaction of KKand πη in the final state interactions. How the two-body invariant mass distributions could be affected by the different weights of the internal and external W-emission mechanisms in the study of the reactions Dþ → πþηη and Dþ → πþπ0η [36], where the future experimental data were expected to be helpful to pin down the reaction mechanisms and the contribution of the a0ð980Þ resonance.

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