Strong Coupling Constants of the Doubly Heavy Spin-1/2 Baryons with Light Pseudoscalar Mesons

Abstract

The strong coupling constants of hadronic multiplets are fundamental parameters which carry information about the strong interactions among participating particles. These parameters can help us construct the hadron-hadron strong potential and gain information about the structure of the involved hadrons. Motivated by the recent observation of the doubly charmed state by LHCb, we determine the strong coupling constants among the doubly heavy spin-1/2 baryons, , and light pseudoscalar mesons, , K, and within the framework of the light cone QCD sum rules. The obtained results may help experimental groups in analysis of the related data at hadron colliders.

Strong Vertices of Doubly Heavy Spin-3/2 Baryons with Light Pseudoscalar Mesons

“…[45], one finds out that the values of the strong coupling constants among the doubly heavy spin-3/2 baryons and light pseudoscalar mesons are mostly larger than that of the spin-1/2 baryons with the same mesons taken into account in Ref. [45].…”

“…The procedure to construct the doubly heavy spin-3/2 interpolating current is to make a diquark structure having spin one and then attach the remaining spin-1/2 quark to that to build a spin-3/2 structure which has to contain the quantum numbers of the related baryon. Following the line of [23] and [45] one can find the corresponding interpolating current as follows. The diquark structure has the form…”

“…Beyond the quark models [36][37][38], many effective models like lattice QCD [39], Quark Spin Symmetry [40,41], QCD Sum Rules [22][23][24][25][26] and Light-Cone Sum Rules [19,20,[42][43][44][45][46][47][48][49] have been proposed to describe masses, residues, lifetimes, strong coupling constants, and other properties of doubly heavy baryons. Given that the expectations to discover more doubly heavy baryons are growing, we are witnessing the rise of further theoretical investigations in this respect.…”

QCD sum rules analysis of weak decays of doubly heavy baryons: the $$b\rightarrow c$$ processes

“…The discovery of the doubly charmed baryon has triggered many related theoretical researches on the masses, lifetimes, strong coupling constants, and decay widths of doubly heavy baryons. They are based on various model calculations , SU(3) symmetry analysis [27][28][29], effective theories [30][31][32][33][34][35][36][37][38][39][40], QCD sum rules [41][42][43] and light-cone sum rules [44][45][46][47][48][49][50][51][52]. For a recent review, see [53].…”

QCD sum rules analysis of weak decays of doubly heavy baryons: the $b\to c$ processes

“…The discovery of the doubly charmed baryon has triggered many related theoretical researches on the masses, lifetimes, strong coupling constants, and decay widths of doubly heavy baryons. They are based on various model calculations , SU(3) symmetry analysis [27][28][29], effective theories [30][31][32][33][34][35][36][37][38][39][40], QCD sum rules [41][42][43]and light-cone sum rules [44][45][46][47][48][49][50][51][52]. For a recent review, see [53].…”