Partial-Wave Analysis of the ωππ Final State at COMPASS

by Philipp Haas

Thursday 2 Nov 2023, 09:30 → 11:00 Europe/Berlin

E18 Seminar Room

The COMPASS experiment is a fixed-target experiment at the CERN SPS. One of its goals is to study the light-meson spectrum. This includes the search for exotic mesons, which cannot be described as quark-antiquark states. COMPASS has acquired the so-far largest data samples for diffractive production of several final states. Therefore COMPASS was able to study the exotic meson $\pi_1(1600)$ with consistent analyses in the final states $\pi^-\pi^-\pi^+$, $\eta\pi^-$, and $\eta'\pi^-$. However, lattice QCD predicts the dominant decay of $\pi_1(1600)$ to be $b_1(1235)\pi$, which can be studied in the $\omega(782)\pi^-\pi^0$ final state.
In this talk we will present the current status of the $\omega(782)\pi^-\pi^+$ analysis.