# Dalitz plot analysis of the $D^+\to K^-K^+K^+$ decay

## TL;DR

This paper presents the first detailed Dalitz plot analysis of the decay D+ to K-K+K+ using LHCb data, revealing the dominant S-wave component and providing insights into K-K+ scattering amplitudes.

## Contribution

It introduces the first amplitude analysis of the D+ to K-K+K+ decay, employing isobar and chiral Lagrangian models to study the resonant structure and scattering amplitudes.

## Key findings

- S-wave component is dominant in the decay
- Small contribution from phi(1020) meson
- Negligible tensor resonance contributions

## Abstract

The resonant structure of the doubly Cabibbo-suppressed decay $D^+ \to K^-K^+K^+$ is studied for the first time. The measurement is based on a sample of pp-collision data, collected at a centre-of-mass energy of 8 TeV with the LHCb detector and corresponding to an integrated luminosity of 2 fb$^-1$. The amplitude analysis of this decay is performed with the isobar model and a phenomenological model based on an effective chiral Lagrangian. In both models the S-wave component in the $K^-K^+$ system is dominant, with a small contribution of the $\phi(1020)$ meson and a negligible contribution from tensor resonances. The $K^-K^+$ scattering amplitudes for the considered combinations of spin (0,1) and isospin (0,1) of the two-body system are obtained from the Dalitz plot fit with the phenomenological decay amplitude.