Partial-Wave Analysis of the 𝜔𝜋𝜋 Final State at COMPASS

by Philipp Haas

Thursday Oct 31, 2024, 9:30 AM → 10:30 AM Europe/Berlin

E18/ENE Seminar Room 3268 (TUM PH)

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.