Speaker
Description
The COMPASS experiment at the SPS-enjected M2 beam line at CERN is a major player in the field of light-meson spectroscopy. The two-stage spectrometer provided a good acceptance and covered a wide kinematic range for charged and neutral particles, allowing to access a wide range of final states. Operating with liquid hydrogen as well as heavier nuclear targets and a negative hadron beam at 190 GeV/c, the diffractively produced excited states $\pi_J$, $a_J$ and $K_J$ can be accessed.
The talk will be focused on the signal of the lightest hybrid candidate with spin-exotic quantum numbers $J^{PC}=1^{−+}$ measured at COMPASS and final states in which we can observe it such as $\pi^-\pi^+\pi^-$, $\eta^{(\prime)}\pi^-$, $\omega\pi^-\pi^0$, $\pi^-\pi^+\pi^-\eta$. In addition, we highlight our new results of the $K^-\pi^+\pi^-$ final state.
| Collaboration | COMPASS |
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