Signatures of odd-parity s-wave Ξ* states in femtoscopic correlation functions

We investigate the Ξ* resonances within the molecular picture, where these states are dynamically generated as poles in the unitarized scattering amplitudes arising from the coupled-channel interactions of K*−Λ, K*−Σ0, ρ−Ξ0, K‾*0Σ−, ρ0Ξ−, ωΞ−, and ϕΞ−. The interaction kernel is derived from the local hidden gauge formalism, while the unitarization procedure employs a hybrid method that combines cutoff and dimensional regularizations in the evaluation of the loop function. From a detailed spectroscopic analysis, we identify two S=−2 baryon states whose properties are compatible with some of the Ξ* resonances listed in the Review of Particle Physics. To explore their possible experimental signatures, we compute the femtoscopic correlation functions for all the vector–baryon pairs considered in the present study, using realistic estimates of production weights and varying source sizes R=1,1.1,1.2,1.3,1.5 fm.