# Production and absorption of exotic bottomonium-like states in high energy heavy ion collisions

## TL;DR

This paper studies how exotic bottomonium-like states Z_b and Z_b' are produced and absorbed in high-energy heavy ion collisions, using effective field theories to calculate interaction cross sections.

## Contribution

It introduces a novel calculation of production and absorption cross sections for Z_b states in a hadronic medium using an extended effective Lagrangian framework.

## Key findings

- Absorption cross sections are significantly larger than production cross sections.
- Effective Lagrangians based on SU(4) extension are used to model interactions.
- Results provide insights into the behavior of exotic states in heavy ion collisions.

## Abstract

We investigate the production and absorption of $Z_b (10610)$ and $Z_b ^{\prime}(10650)$ states in a hadronic medium, via the processes $\bar{B}^{(*)} B^{(*)} \rightarrow \pi Z_b ^{(\prime)} $ and the corresponding inverses reactions. We use effective field Lagrangians based on an $SU(4)$-extension of the hidden gauge formalism to account for the couplings between light and heavy mesons, and a phenomenological Lagrangian involving the $ B^{\ast} B^{(\ast)} Z_b ^{(\prime)}$ vertices. The absorption cross sections are found to be much larger than the production ones.