S =-1 meson-baryon interaction and the role of isospin filtering processes

0504073 - ÚJF 2020 RIV US eng J - Článek v odborném periodiku
Feijoo, Aliau Eduardo Alberto - Magas, V. - Ramos, A.
S =-1 meson-baryon interaction and the role of isospin filtering processes.
Physical Review C. Roč. 99, č. 3 (2019), č. článku 035211. ISSN 2469-9985. E-ISSN 2469-9993
Institucionální podpora: RVO:61389005
Klíčová slova: meson-baryon interaction * chiral model * cross section
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 2.988, rok: 2019
Způsob publikování: Open access
https://doi.org/10.1103/PhysRevC.99.035211

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+Xi(-), K-0 Xi(0) reactions. The consideration of additional cross sections in single isospin channels, K(-)p -> eta Lambda, eta Sigma, 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 = 1K(L)(0)p -> K+Xi(0) reaction that could be measured at the proposed secondary K-L(0) beam at Jlab, or the weak decay of the Lambda(b) into a J/Psi 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.
Trvalý link: http://hdl.handle.net/11104/0295780