Magas, VolodymyrValcarce Cadenas2022-09-132022-09-132022-06https://hdl.handle.net/2445/188937Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2022, Tutor: Volodymyr MagasWe show that two Ξ∗ poles can be dynamically generated in a coupled-channels chiral model with next-to-leading order terms in Lagrangian, focusing on the study of low-energy mesonbaryon scattering in the strangeness S = −2 sector and isospin I = 1/2. One of the resonances found, which has a mass of about 1600 MeV, couples very strongly to the πΞ channel. Consequently, it can be identified as the Ξ(1620) state with JP = 1/2−. The second pole detected, near the ¯K Σ threshold, can be identified as an s-wave ¯K Σ molecular state, which we can associate with the Ξ(1690) resonance assigning it the same quantum numbers as the previous one8 p.application/pdfengcc-by-nc-nd (c) Valcarce, 2022http://creativecommons.org/licenses/by-nc-nd/3.0/es/QuiralitatInteraccions mesó-barióTreballs de fi de grauChiralityMeson-Baryon interactionsBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess