StrongDs*Dsη(′)andBs

Abstract

The strong D * s Dsη (′) and B * s Bsη (′) vertices are studied and the relevant couplings are calculated in the context of the light-cone QCD sum rule method with twist-4 accuracy by including the nextto-leading order corrections. In the analysis, both the quark and gluon components of the η and η ′ mesons and the axial anomaly corrected higher twist distributions are included.

Four-quark exotic mesons

“…The η − η ′ mixing can be described using two basics. For our analysis a suitable is the quark-flavor basis, which was employed to investigate various exclusive processes with η ′ and η mesons [206][207][208]. In this basis the twist-3 matrix element ⟨η ′ |siγ 5 s|0⟩ is given by the formula…”

Open charm-bottom scalar tetraquarks and their strong decays

“…The latter is founded on thess and (ūu +dd)/ √ 2 as the basic states, and is convenient to describe the mixing phenomena of the η − η ′ system, including mixing of the physical states, decay constants and higher twist distribution amplitudes [Ref. [43][44][45][46]]. …”

“…[44][45][46] it was assumed that the parameters h s(q) η obey the same mixing scheme as the decay constants of the eta mesons, and hence the following equality holds:…”

Application of the QCD light cone sum rule to tetraquarks: The strong verticesXbXbρandAgaev1, Azizi2, Sundu3 2016Phys. Rev. DSelf Cite320190View full textAdd to dashboardCite

“…This method previously was applied to analyze numerous vertices of conventional mesons and baryons, and calculate corresponding couplings, form factors. Here we are able to cite only some of the works devoted to this interesting topic of hadron physics [40][41][42][43][44][45] noting among them Ref. [45], where, for the first time, effects of the η and η ′ mesons' gluon components on the strong vertices D *…”