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oai:recercat.cat:2445/1406002025-12-05T17:00:28Zcom_2072_1057col_2072_478823col_2072_478917

urn:hdl:2445/140600 The S=−1 meson-baryon interaction and the role of isospin filtering processes Feijoo Aliau, Albert Magas, Volodymyr Ramos Gómez, Àngels Interaccions d'hadrons Física de partícules Física nuclear Hadron interactions Particle physics Nuclear physics A study of the meson-baryon interaction in the S = −1 sector is performed, employing a chiral SU(3) Lagrangian up to next-to-leading order (NLO) and implementing unitarization in coupled channels. The model is constrained by a large set of experimental data, paying special attention to processes that are sensitive to the NLO contributions, such as the K− p → K+−, K00 reactions. The consideration of additional cross sections in single isospin channels, K− p → η , η , has been found to provide NLO low-energy constants of rather similar size. The stability of these constants has also been tested by the inclusion of explicit resonant terms. Predictions for new isospin filtering processes, like the I = 1 K0 L p → K+0 reaction that could be measured at the proposed secondary K0 L beam at Jlab, or the weak decay of the b into a J/ and different meson-baryon pairs in I = 0, available at LHCb, are presented. The measurement of such reactions would put valuable constraints on the chiral models describing the S = −1 meson-baryon interaction. 2019-09-20T07:21:47Z 2019-09-20T07:21:47Z 2019-03-22 2019-09-20T07:21:47Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevC.99.035211 Physical Review C, 2019, vol. 99, num. 3, p. 035211-1-035211-18 https://doi.org/10.1103/PhysRevC.99.035211 (c) American Physical Society, 2019 info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)