Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, cilt.874, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 874
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.physletb.2026.140227
- Dergi Adı: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC, MathSciNet, zbMATH, Directory of Open Access Journals
- Anahtar Kelimeler: Femtoscopy, Meson-baryon interaction, Molecular states, Strangeness, Strong interaction
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
Meson-baryon systems with strangeness content provide a unique laboratory for investigating the strong interaction and testing theoretical models of hadron structure and dynamics. In this work, the measured correlation functions for oppositely charged Ξ-K and Ξ−π pairs obtained in high-multiplicity pp collisions at s=13 TeV at the LHC are presented. For the first time, high-precision data on the Ξ-K interaction are delivered at small relative momenta. The scattering lengths, extracted via the Lednický–Lyuboshits expression of the pair wavefunction, indicate a repulsive and a shallow attractive strong interaction for the Ξ-K and Ξ−π systems, respectively. The Ξ(1620) and Ξ(1690) states are observed in the Ξ−π correlation function and their properties, mass and width, are determined. These measurements are in agreement with other available results. Such high-precision data can help refine the understanding of these resonant states, provide stronger constraints for chirally motivated potentials, and address the key challenge of describing the coupled-channel dynamics that may give rise to molecular configurations.