Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 11: Hadron Structure and Spectroscopy III
HK 11.6: Vortrag
Dienstag, 17. März 2026, 18:00–18:15, PHIL C 301
K0Σ0 photoproduction at the BGOOD experiment — •Adrian Sonnenschein for the BGOOD collaboration — Physikalisches Institut, Nussallee 12, 53115 Bonn, Germany
The BGOOD experiment at the ELSA accelerator facility uses an energy tagged bremsstrahlung photon beam to investigate hadronic excitations in meson photoproduction in the light quark sector.
The associated photoproduction of KS0 and hyperons is of particular interest. A cusp-like structure observed in the γ p → KS0Σ+ reaction at the K* threshold is described by models including multi-quark resonances through dynamically generated vector meson-baryon interactions. This is the same model which predicted the PC pentaquark states observed at LHCb through D*Σc interactions and if proven correct, would provide evidence of molecular-like states in the strangeness sector. The model predicts a peak like structure in KS0Σ0 photoproduction at the K* threshold, which is the motivation for the measurement present here.
The reaction γ n → KS0Σ0 has been measured at BGOOD from threshold to a beam energy of 2600 MeV. The analysis procedure is based upon a previous BGOOD publication, however employing additional kinematic fitting techniques with improved statistical precision. Preliminary differential cross section measurements will be presented.