Hadron Spectroscopy with COMPASS

TL;DR

This paper reports on the COMPASS experiment's recent partial-wave analyses of hadronic final states, aiming to discover new hadronic states like spin-exotic mesons and glueballs, using high-energy pion beams.

Contribution

It presents new partial-wave analysis results of (3π)^- and π^-η' final states, providing insights into hadron spectroscopy and the search for exotic states.

Findings

Analysis of (3π)^- states reveals potential exotic mesons.

First results from K^- dissociation analysis show promising signals.

Data supports ongoing search for glueballs and spin-exotic mesons.

Abstract

COMPASS is a multi-purpose fixed-target experiment at the CERN Super Proton Synchrotron aimed at studying the structure and spectrum of hadrons. One primary goal is the search for new hadronic states, in particular spin-exotic mesons and glueballs. We present recent results of partial-wave analyses of (3\pi)^- and \pi^-\eta' final states based on a large data set of diffractive dissociation of a 190 GeV/c \pi^- beam on a proton target in the squared four-momentum-transfer range 0.1 < t' < 1 (GeV/c)^2. We also show first results from a partial-wave analysis of diffractive dissociation of K^- into K^-\pi^+\pi^- final states are presented.