SMuK 2021 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Hadron Structure and Spectroscopy I
HK 4.2: Vortrag
Montag, 30. August 2021, 17:00–17:15, H3
KS0Σ0 photoproduction at the BGOOD experiment — •Katrin Kohl for the BGOOD collaboration — Physikalisches Institut, Nussallee 12, D-53115 Bonn
The BGOOD experiment at the ELSA accelerator facility uses an energy tagged bremsstrahlung photon beam to investigate hadronic excitations in meson photoproduction.
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. In analogy, in the s-quark sector a peak like structure in KS0Σ0 photoproduction off the neutron is predicted, associated with a K*-Σ type configuration.
This talk presents the measurement of the γ n → KS0Σ0 differential cross section from threshold to a beam energy of 2600 MeV. Within the available statistics the results appear consistent with the predicted peak like structure.
*Supported by DFG projects 388979758/405882627 and the European Union’s Horizon 2020 programme, grant 824093.