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HK: Fachverband Physik der Hadronen und Kerne
HK 11: Hadron Structure and Spectroscopy II
HK 11.1: Vortrag
Montag, 11. März 2024, 16:45–17:00, HBR 62: EG 19
Photoproduction of K+(Σ(1385)→ Λ π0) at very forward K+ angles at the BGOOD experiment — •Mrunmoy Jena for the BGOOD collaboration — Physikalisches Institut, Universität Bonn
The differential cross section for photoproduction of K+ Σ0 previously carried out at the BGOOD showed a peak like structure followed by a significant decrease in strength around W=1900 MeV (at very forward angles) potentially indicating the formation of a bound K+Σ(1385) molecular state. If this is the case, there appears to be an equivalence between this proposed state in the strange quark sector and the Pc(4380) state in the charm sector identified at the LHCb. In light of these results, a precision measurement near threshold at forward K+ angles for γ p → K+Σ(1385) is essential to shed light on the reaction mechanism.
This work reports for the first time, the differential cross section for the γ p → K+Σ(1385) for the dominant decay channel Σ(1385)→ Λ π0 at very forward angles (cosθCMK > 0.9). The missing mass (from the K+π0π0 and the K+π0 system) technique was used for event reconstruction and to remove K+ Λ(1405) background events.
Supported by DFG projects 388979758/405882627 and the European Union’s Horizon 2020 programme, grant 824093.
Keywords: Hadronic molecules; Photoproduction; Differential cross section; Missing mass technique; Strange quark sector