期刊
EUROPEAN PHYSICAL JOURNAL C
卷 76, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-016-4302-7
关键词
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资金
- Spanish Ministerio de Economia y Competitividad (MINECO) under the project of ICCUB (Unidad de Excelencia Maria de Maeztu') [MDM-2014-0369]
- European FEDER funds [FIS2011-28853-C02-01, FIS2011-24154, FIS2014-54762-P]
- Generalitat Valenciana [Prometeo II-2014/068]
- Generalitat de Catalunya [2014SGR-401]
- Spanish Excellence Network on Hadronic Physics [FIS2014-57026-REDT]
The hidden-charm pentaquark P-c(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 Lambda b, just as in the case of the non-strange P-c(4450), but looking into the J/psi eta Lambda decay mode and forming the invariant mass spectrum of J/psi Lambda 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/psi eta Lambda final states to be populated with similar strength as the J/psi K- p states employed for the observation of the non-strange pentaquark. This makes the Lambda b -> J/psi eta Lambda decay to be an interesting process to observe a possible strange partner of the P-c(4450). We study the dependence of the J/psi Lambda mass spectra on various model ingredients and on the unknown properties of the strange pentaquark.
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