Search for Hidden-strangeness Pentaquark States near φp Threshold

Multiquark hadrons have attracted much attention since the discovery of tetraquark and pentaquark states containing a charm quark. Observing such many multiquark candidates poses a question on the dripline of further multiquark states. In the baryon sector, hidden-charm pentaquark states, Pc(4380) and Pc(4440) (likely J^P=3/2-), lie near the Λc*D and ΣcD*, respectively. These states have been observed only in the J/ψp channel. Similarly, their strangeness partners, Ps states, near the Λ*K and ΣK* mass thresholds could exist and decay mainly to φp. Unveiling the nature of Ps states is fascinating. We propose complementary measurements of Ps production reactions using photon and meson beams, which include γp->πφN at SPring-8 and π-p->φn reactions at J-PARC. This talk will discuss simulation results with the LEPS2 and P95 detectors.