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

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초록

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 Xi-K and Xi-pi pairs obtained in high-multiplicity pp collisions at root s = 13 TeV at the LHC are presented. For the first time, high-precision data on the Xi-K interaction are delivered at small relative momenta. The scattering lengths, extracted via the Lednicky-Lyuboshits expression of the pair wavefunction, indicate a repulsive and a shallow attractive strong interaction for the Xi-K and Xi-pi systems, respectively. The Xi(1620) and Xi(1690) states are observed in the Xi-pi 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.

키워드

Meson-baryon interactionStrong interactionFemtoscopyStrangenessMolecular statesK-P INTERACTIONSSIGMA-HYPERON PRODUCTIONCROSS-SECTIONSCHIRAL DYNAMICSCHARGE-EXCHANGEMOMENTUM RANGECOLLISIONSRESONANCEHYDROGENSTATES
제목
Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC
저자
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DOI
10.1016/j.physletb.2026.140227
발행일
2026-03
유형
Article
저널명
PHYSICS LETTERS B
874