TY  - JOUR
AU  - Feijoo, A.
AU  - Magas, V. K.
AU  - Ramos, A.
AU  - Oset, E.
PY  - 2016
DA  - 2016//
TI  - A hidden-charm S =-1 pentaquark from the decay Lambda(b) into J/psi eta Lambda states
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 446 - 12pp
VL  - 76
IS  - 8
PB  - Springer
AB  - 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.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1512.08152
UR  - https://doi.org/10.1140/epjc/s10052-016-4302-7
DO  - 10.1140/epjc/s10052-016-4302-7
LA  - English
N1  - WOS:000399606600001
ID  - Feijoo_etal2016
ER  -