Study of Hadronic Five-Body Decays of Charmed Mesons

TL;DR

This paper reports the discovery and measurement of specific five-body decay modes of D+ and Ds+ mesons, including analysis of their resonant substructures, primarily proceeding through an a1 vector resonance.

Contribution

It presents the first observation of the D+ -> K+K-Pi+Pi+Pi- decay and provides detailed measurements and substructure analysis of several five-body charmed meson decays.

Findings

Discovery of D+ -> K+K-Pi+Pi+Pi- decay mode

Measurements of branching ratios for multiple five-body decays

Evidence that decays proceed mainly through an a1 vector resonance

Abstract

We study the decay of D+ and Ds+ mesons into charged five body final states, and report the discovery of the decay mode D+ -> K+K-Pi+Pi+Pi-, as well as measurements of the decay modes D+ -> K-Pi+Pi+Pi+Pi-, Ds+ -> K+K-Pi+Pi+Pi-, Ds+ -> PhiPi+Pi+Pi- and D+/Ds+ -> Pi+Pi+Pi+Pi-Pi-. An analysis of the resonant substructure is also included, with evidence suggesting that both decays proceed primarily through an a1 vector resonance.