Searching for tetraquark through weak decays of b-baryons

Abstract

After the experimental observation of charged and neutral $$Z_c(3900)$$ Z c ( 3900 ) , it is of prime importance to pursue searches for additional production modes of these exotic states. In this work, we investigate the possibility to study the $$Z_c(3900)$$ Z c ( 3900 ) through weak decays of b-baryons at the LHCb. Decay amplitudes for various processes have been parametrized in terms of the SU(3) irreducible nonperturbative amplitudes. A number of relations for the partial decay widths are deduced from these results. The decay widths of $$\Lambda _b^0\rightarrow \Lambda ^0 Z_c^0(3900)$$ Λ b 0 → Λ 0 Z c 0 ( 3900 ) , $$\Xi _b^- \rightarrow \Sigma ^- Z_{c}^0(3900)$$ Ξ b - → Σ - Z c 0 ( 3900 ) and $$\Xi _b^0 \rightarrow \Lambda ^0 Z_{c}^0(3900)$$ Ξ b 0 → Λ 0 Z c 0 ( 3900 ) have also been calculated from which some relevant partial decay widths of b-baryons could be estimated. The results presented in this paper can be tested experimentally at hadron colliders in the future.

Bottomoniumlike tetraquarks in a chiral quark model

“…Furthermore, to explain the mentioned states, charmonium-like compact tetraquarks and threshold bumps have been proposed in constituent quark model investigations [68,69]. The strong and weak decays of the Z c (3900) and Z c (4020) have been studied [70][71][72], their properties in cold dense matter have been analyzed [73] and a lattice QCD simulation has been performed too [74].…”

The Production of Charm Pentaquark from B meson within SU(3) Analysis

“…Note that the light quark symmetry have been successfully adopted in generic hadronic system [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48], which provides a general insight for the decays and productions of hadron, then to be an useful approach to discuss the pentaquark production from B meson. The study is based on the representations of pentaquark, final hadrons and weak transition operator.…”