Decays of Zb(+) and Zb'(+) as hadronic molecules

TL;DR

This paper models the newly observed Zb(10610) and Zb'(10650) mesons as hadronic molecules, predicting their decay widths into bottomonium states and pions using a phenomenological Lagrangian framework.

Contribution

It provides the first theoretical predictions for the decay widths of Zb(+) and Zb'(+) as hadronic molecules, supporting their molecular interpretation.

Findings

Predicted decay widths for Zb(+) to Upsilon(nS) + pi(+)

Predicted decay widths for Zb'(+) to Upsilon(nS) + pi(+)

Supports the molecular nature of Zb(10610) and Zb'(10650)

Abstract

The two newly observed hidden-bottom mesons Zb(10610) and Zb'(10650) with quantum numbers J(P) = 1(+) are considered as hadronic molecules composed of BB(*) and B(*)B(*), respectively. We give predictions for the widths of the strong two-body decays Zb(+) to Upsilon(nS) + pi(+) and Zb'(+) to Upsilon(nS) + pi(+) in a phenomenological Lagrangian approach.