Decays and productions via bottomonium for Z_b resonances and other B anti-B molecules

TL;DR

This paper investigates the decay and production mechanisms of bottomonium-like molecular states, specifically Zb resonances, using heavy quark symmetry to derive testable, model-independent relations among their decay and production rates.

Contribution

It introduces a novel approach applying heavy quark symmetry to relate decay and production rates of bottomonium molecules in a model-independent way.

Findings

Derived relations among decay and production rates of Zb states

Predicted specific decay patterns consistent with experimental data

Provided a framework for testing molecular state hypotheses

Abstract

We discuss decays and productions for the possible molecular states formed by bottom mesons B (B*) and anti-B (anti-B*). The twin resonances found by Belle, Zb(10610) and Zb(10650), are such candidates. The spin wave functions of the molecular states are rearranged into those of heavy and light spin degrees of freedom by using the re-coupling formulae of angular momentum. By applying the heavy quark symmetry we derive model independent relations among various decay and production rates, which can be tested in experiments.