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HK: Fachverband Physik der Hadronen und Kerne

HK 29: Hadron Structure and Spectroscopy V

HK 29.3: Vortrag

Donnerstag, 19. März 2026, 14:30–14:45, PHIL C 301

Search for the spin-exotic π₁(1600) in a three-pion system with GlueX data — •Ilia Belov and Farah Afzal for the GlueX collaboration — Institut für Experimentalphysik I, Ruhr-Universität Bochum, 44801 Bochum, Germany

The GlueX experiment in Hall D at Jefferson Lab is designed for studies of the light meson spectrum with an emphasis on searches for hybrid mesons that have exotic quantum numbers and therefore cannot be classified as conventional hadrons. The experimental facility exploits a linearly polarized tagged photon beam in the energy range from 8.2 to 8.8 GeV. The photon beam is incident on a liquid hydrogen fixed target. The detector setup consists of a spectrometer with a nearly 4π angular coverage, which has excellent capabilities for reconstruction of charged particle tracks, reconstruction of electromagnetic showers, and charged particle identification. Advanced searches for spin-exotic mesons are performed through the application of Partial Wave Analysis techniques.

The π₁(1600) hadron with 1⁻⁺ quantum numbers is predicted to have a considerable decay width to a three-pion system. In this talk, I present studies towards a Partial Wave Analysis of the π⁺π⁻π⁻ system produced in the γ p→ π⁺π⁻π⁻Δ⁺⁺(→ pπ⁺) reaction with a polarized beam.

Keywords: Photoproduction; Partial Wave Analysis; Exotic meson spectroscopy; JLAB