The hybrid nonet of $\pi_1(1600)$ and $\eta_1(1855)$: analysis and predictions for the kaonic members

TL;DR

This paper analyzes the masses and decay channels of the hybrid meson nonet, including the recently observed $ ext{η}_1(1855)$, using a hadronic model to predict properties of kaonic members.

Contribution

It provides a combined analysis of the hybrid meson nonet, incorporating experimental and lattice data to predict decay channels and properties of kaonic hybrid mesons.

Findings

Identification of decay channels for hybrid kaons.

Extraction of coupling constants from experimental and lattice data.

Predictions for properties of kaonic hybrid mesons.

Abstract

The hybrid mesons form a part of the exotic spectrum of the standard model. The recent observation of the isoscalar hybrid, called the $\eta_1(1855)$, provides an important step towards the completion of the $1^{-+}$ nonet. In the present work, we analyze the masses and two-body decays of the members of this nonet using a model hadronic Lagrangian. The isovector $\pi_1(1600)$ has been studied extensively - both experimentally and on lattice. We use the available experimental and lattice data to extract the coupling constants. Using these parameters, we analyze the possible decay channels for the hybrid kaons.