COMPASS Hadron Spectroscopy -- Final states involving neutrals and kaons

TL;DR

The COMPASS experiment at CERN investigates light-hadron spectroscopy, focusing on detecting new states such as exotic mesons and glueballs, using advanced detectors to analyze neutral and strange final states from high-energy hadron collisions.

Contribution

This work presents new data and analysis techniques for studying neutral and strange final states in light-hadron spectroscopy, enhancing the search for exotic states and glueballs.

Findings

Analysis of diffractively produced $(^0^0^0)$ final states

Analysis of $(Kar{K}\u0010)$ final states

Progress in identifying exotic mesons and glueballs

Abstract

The COMPASS experiment at CERN is well designed for light-hadron spectroscopy with emphasis on the detection of new states, in particular the search for $J^{PC}$-exotic states and glueballs. We have collected data with 190 GeV/c charged hadron beams on a liquid hydrogen and nuclear targets in 2008/09. The spectrometer features good coverage by electromagnetic calorimetry and a RICH detector further provides $\pi$ / $K$ separation, allowing for studying final states involving neutral particles like $\pi^0$ or $\eta$ as well as hidden strangeness, respectively. We discuss the status of ongoing analyses with specific focus on diffractively produced $(\pi^0\pi^0\pi)^{-}$ as well as $(K\bar{K}\pi)^{-}$ final states.