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Title: | A hidden-charm S=-1 pentaquark from the decay of Λb into J/ψηΛ states |
Author: | Feijoo Aliau, Albert Magas, Volodymyr Ramos Gómez, Àngels Oset Baguena, Eulogio |
Keywords: | Fenomenologia (Física) Quarks Microagregats Partícules (Física nuclear) Acceleradors de partícules Phenomenological theory (Physics) Quarks Microclusters Particles (Nuclear physics) Particle accelerators |
Issue Date: | 10-Aug-2016 |
Publisher: | Società Italiana di Fisica & Springer Verlag |
Abstract: | 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1140/epjc/s10052-016-4302-7 |
It is part of: | European Physical Journal C, 2016, vol. 76, num. 8, p. 446-1-446-12 |
URI: | http://hdl.handle.net/2445/116244 |
Related resource: | https://doi.org/10.1140/epjc/s10052-016-4302-7 |
ISSN: | 1434-6044 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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