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The S=−1 meson-baryon interaction and the role of isospin filtering processes
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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.
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FEIJOO ALIAU, Albert, MAGAS, Volodymyr and RAMOS GÓMEZ, Àngels. The S=−1 meson-baryon interaction and the role of isospin filtering processes. Physical Review C. 2019. Vol. 99, num. 3, pags. 035211-1-035211-18. ISSN 2469-9985. [consulted: 28 of August of 2026]. Available at: https://hdl.handle.net/2445/140600