Spectroscopic and femtoscopic insights into vector-baryon interactions in the strangeness $-1$ sector

TL;DR

This paper investigates vector-baryon interactions in the strangeness -1 sector using a unitarized coupled-channel approach, predicting correlation functions and linking theoretical states with experimental data to improve understanding of hyperon spectra.

Contribution

It introduces a renormalization scheme for femtoscopy, performs comprehensive spectroscopy, and predicts correlation functions for meson-baryon pairs, connecting theoretical models with experimental observations.

Findings

Compatibility between extracted poles and known hyperon states

Predicted distinctive signatures in correlation functions

Enhanced understanding of odd-parity hyperon spectra up to 2 GeV

Abstract

We revisit the strangeness $-1$ sector of the interaction between vector mesons of the $\rho-$nonet and $1/2^+$ ground state baryons ($VB$), within the unitary coupled-channel hidden gauge formalism. We adopt a renormalization scheme that induces a reasonable short-distance behavior of the two-hadron wave functions, which is the major limitation of femtoscopy techniques at this time. We perform an exhaustive spectroscopy study, implementing different improvements and considerations, and find compatibilities between the poles extracted from the present approach, and some of the states listed in the Review of Particle Physics. Finally, we predict several correlation functions (CFs) associated with various meson-baryon pairs in this sector, paying special attention to the distinctive and clear signatures produced by the dynamically generated states. To obtain realistic estimates for the CFs, we have calculated the production weights using the Thermal-FIST package. Such studies will shed light into the odd-parity $\Lambda^*$ and $\Sigma^*$ hadron spectra, up to 2 GeV, and will open the strategy to improve effective field theories by using low-energy constants fitted to femtoscopy data.