Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/129966
A meson-baryon molecular interpretation for some (Ωc) excited states
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
We explore the possibility that some of the five narrowΩcresonances recently observed at LHCbcould correspond to pentaquark states, structured as meson-baryon bound states or molecules. The inter-action of the low-lying pseudoscalar mesons with the ground-state baryons in the charm +1, strangeness−2 and isospin 0 sector is built from t-channel vector meson exchange, using effective Lagrangians. Theresulting s-wave coupled-channel unitarized amplitudes show the presence of two structures with similarmasses and widths to those of the observedΩc(3050)0andΩc(3090)0. The identification of these reso-nances with the meson-baryon bound states found in this work would also imply assigning the values 1/2−for their spin-parity. An experimental determination of the spin-parity of theΩc(3090)0would contributeto a better understanding of its structure, as the quark-based models predict its spin-parity to be either3/2−or 5/2−. Predictions for the analogue bottomΩ−bresonances are also given.
Citació
Citació
MONTAÑA FAIGET, Glòria, FEIJOO ALIAU, Albert and RAMOS GÓMEZ, Àngels. A meson-baryon molecular interpretation for some (Ωc) excited states. European Physical Journal A. 2018. Vol. 54, num. 4, pags. 64. ISSN 1434-6001. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/129966