Title:
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A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states
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Author:
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Feijoo, Alberto; Magas, Volodymyr; Ramos Gómez, Àngels; Oset Baguena, Eulogio
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Other authors:
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Universitat de Barcelona |
Abstract:
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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. |
Subject(s):
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-Fenomenologia (Física) -Quarks -Microagregats -Partícules (Física nuclear) -Acceleradors de partícules -Phenomenological theory (Physics) -Quarks -Microclusters -Particles (Nuclear physics) -Particle accelerators |
Rights:
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cc-by (c) Feijoo, Alberto et al., 2016
http://creativecommons.org/licenses/by/3.0/es |
Document type:
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Article Article - Published version |
Published by:
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Società Italiana di Fisica & Springer Verlag
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