Ξbb and Ωbbb molecular states * * Partly supported by the National Natural Science Foundation of China (11975083, 11947413, 11847317, 11565007, 11735003, 1191101015). Q. X Yu acknowledges the support from the National Natural Science Foundation of China (11775024, 11575023, 11805153) and China Scholarship Council. Partly supported by the Spanish Ministerio de Economia y Competitividad and European FEDER funds (FIS2017- 84038-C2-1-P

J M Dias,Qi-Xin Yu,Wei-Hong Liang,Ju-Jun Xie,Zhi-Feng Sun,E Oset

doi:10.1088/1674-1137/44/6/064101

Abstract

Using the vector exchange interaction in the local hidden gauge approach, which in the light quark sector generates the chiral Lagrangians and has produced realistic results for and the hidden charm pentaquark states, we study the meson-baryon interactions in the coupled channels that lead to the and excited states of the molecular type. We obtain seven states of the type with energies between and MeV, and one state at MeV.

Highlights

Doubly- and triply-heavy baryons have attracted continuous theoretical attention [1,2,3] which has been intensified with the recent finding of the Ξ+cc+ state by LHCb [4]
Using the vector exchange interaction in the local hidden gauge approach, which in the light quark sector generates the chiral Lagrangians and has produced realistic results for Ωc, Ξc, Ξb and the hidden charm pentaquark states, we study the meson-baryon interactions in the coupled channels that lead to the Ξbb and Ωbbb excited states of the molecular type
We carried out a study of the interactions of mesonbaryon coupled channels that lead to the formation of bound or resonant states, corresponding to the excited Ξbb and Ωbbb states

Summary

Introduction

Doubly- and triply-heavy baryons have attracted continuous theoretical attention [1,2,3] which has been intensified with the recent finding of the Ξ+cc+ state by LHCb [4]. The decay widths for the channels, proportional to g2i , go to zero and one obtains automatically very narrow widths This property, so naturally obtained with molecular states, is a source of permanent problems in the three-quark or tight pentaquark models of these states [40]. A clear situation favoring molecular states is the recent finding of three narrow pentaquark states by the LHCb collaboration close to the ΣcD , ΣcD ∗ thresholds [41], which have been interpreted in a large number of papers as molecular states [42-56]. We use here the same interaction that has been tested successfully in other cases and make predictions for the Ξbb and Ωbbb states

Formalism

Results

Conclusions