Repercussion of the $a_0(1710)$ [$a_0(1817)$] resonance and future developments

TL;DR

This paper discusses the significance of the newly observed a0(1710)[a0(1817)] resonance, supporting its interpretation as a molecular state and exploring implications for its nature and future experimental studies.

Contribution

It provides theoretical support for the molecular state interpretation of a0(1710)[a0(1817)] and connects recent experimental findings with prior theoretical predictions.

Findings

The a0(1710)[a0(1817)] resonance aligns with the molecular state model.

Supports the idea that a0(1710) is an isospin partner of f0(1710).

Challenges the classification of f0(1710) as a glueball.

Abstract

In this paper, we discuss the significance and prospect for the newly discovered a0(1710)[a0(1817)] resonance state at BESIII experiment, in which they reported the observation of a scalar meson of spin-parity $J^P=0^+$ with isospin $I=1$, branded as $a_0(1817)$. This state may be the same particle as the $a_0(1710)$ observed by the BaBar experiment earlier. As early as 2008, we found that f0(1710) can be regarded as a $K^* \bar{K}^*$ molecular state based on the chiral unitary theory, and there is a partner state $a_0(1710)$ with an isospin $I=1$. Our theoretical prediction based on this picture is in good agreement with the latest BESIII data, which further supports the molecular state picture of $a_0(1710)[a_0(1817)]$. If it is indeed the isospin partner state of $f_0(1710)$, this would rule out $f_0(1710)$ as a glueball candidate. This paper briefly reviews the relevant theoretical studies and suggests new experiments to further examine the nature of $a_0(1710)[a_0(1817)]$.