Erlangen 2026 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 12: Hadron Structure and Spectroscopy IV
HK 12.3: Talk
Tuesday, March 17, 2026, 17:15–17:30, PHIL A 401
Partial-Wave Analysis of B0 → J/ψ K+ π− at Belle (II) — •Martin Bartl, Hans-Günther Moser, and Stefan Wallner — Max-Planck-Institut für Physik, München
We will present Monte Carlo studies for a partial-wave analysis (PWA) of B0 → J/ψ K+ π− at Belle and Belle II. The PWA disentangles contributions from numerous intermediate resonances, e.g. K* mesons in the Kπ subsystem. Background components are described using neural network techniques. We will discuss the search for exotic, i.e. non-qq, states, which can appear in the J/ψ π and J/ψ K subsystems, complementing recent observations by LHCb.
Keywords: Belle II; Tetraquark; Partial-Wave Analysis; Hadron Spectroscopy