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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/116244
A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
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The hidden-charm pentaquark Pc(4450) observed recently by the LHCb collaboration may be of molecular nature, as advocated by some unitary approaches that also predict pentaquark partners in the strangeness S=−1 sector. In this work we argue that a hidden-charm strange pentaquark could be seen from the decay of the Λb, just as in the case of the non-strange Pc(4450), but looking into the J/ψηΛ decay mode and forming the invariant mass spectrum of J/ψΛ pairs. In the model presented here, which assumes a standard weak decay topology and incorporates the hadronization process and final-state interaction effects, we find the J/ψηΛ final states to be populated with similar strength as the J/ψK−p states employed for the observation of the non-strange pentaquark. This makes the Λb→J/ψηΛ decay to be an interesting process to observe a possible strange partner of the Pc(4450). We study the dependence of the J/ψΛ mass spectra on various model ingredients and on the unknown properties of the strange pentaquark.
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FEIJOO ALIAU, Albert, MAGAS, Volodymyr, RAMOS GÓMEZ, Àngels, OSET BAGUENA, Eulogio. A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states. _European Physical Journal C_. 2016. Vol. 76, núm. 8, pàgs. 446-1-446-12. [consulta: 24 de gener de 2026]. ISSN: 1434-6044. [Disponible a: https://hdl.handle.net/2445/116244]