%0 Journal Article
%T A hidden-charm S =-1 pentaquark from the decay Lambda(b) into J/psi eta Lambda states
%A Feijoo, A.
%A Magas, V. K.
%A Ramos, A.
%A Oset, E.
%J European Physical Journal C
%D 2016
%V 76
%N 8
%I Springer
%@ 1434-6044
%G English
%F Feijoo_etal2016
%O WOS:000399606600001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3058), last updated on Thu, 04 May 2017 19:03:05 +0000
%X 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.
%R 10.1140/epjc/s10052-016-4302-7
%U http://arxiv.org/abs/1512.08152
%U https://doi.org/10.1140/epjc/s10052-016-4302-7
%P 446 - 12pp