@polyakov; @an; @sheldon; @anisovich]. QCD sum rules were used to describe these states in Refs. [@azizi; @chenhosaka; @zhiwang; @aliev; @sundu; @maohosaka; @sundu2; @Wang:2017xam]. Lattice QCD has also brought some light into the problem [@mathur]. Some works have emphasized the value of decay properties to obtain information on the nature of these states [@zezhao; @wangzhao; @kim] and a discussion on the possible quantum numbers was done in Ref. [@chengchiang].

In the molecular picture, an update of the work of Ref. [@tejero] was done in Ref. [@angels] using some information from the experimental spectrum to regularize the loops and then giving a description of the mass and width of two states of Ref. [@lhcbexp] as $J^{P}={1/2}^{-}$ meson-baryon molecular states.

In the present work we shall follow Refs. [@romanets; @angels] for the coupled channels and the unitarization procedure. We differ in the input for the interaction, which in our case is based on the local hidden gauge approach, exchanging vector mesons [@hidden1; @hidden2; @hidden4; @Yama; @hideko]. We must clarify this concept. The local hidden gauge approach [@hidden1; @hidden2; @hidden4; @Yama] works with pseudoscalar and vector mesons in the light sector and chiral symmetry is one of its assets, showing up in the limit 