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.

Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC / Abualrob, I.J., Acharya, S., Aglieri Rinella, G., Aglietta, L., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z.U.L., Akindinov, A., Akishina, V., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, B., Alici, A., Alkin, A., Alme, J., Alocco, G., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 874:(2026). [10.1016/j.physletb.2026.140227]

Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC

Bruno, G. E.;Palasciano, A.;Triloki, T.;
2026

Abstract

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.
2026
Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC / Abualrob, I.J., Acharya, S., Aglieri Rinella, G., Aglietta, L., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z.U.L., Akindinov, A., Akishina, V., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, B., Alici, A., Alkin, A., Alme, J., Alocco, G., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 874:(2026). [10.1016/j.physletb.2026.140227]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/298210
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