Analysis of the pseudoscalar partner of the Y(4660) and related bound states

TL;DR

This paper uses QCD sum rules to analyze the properties of pseudoscalar bound states involving charm and bottom quarks, predicting their masses and exploring their possible structures beyond traditional molecular or hadro-charmonium models.

Contribution

It provides new mass predictions for several pseudoscalar bound states using QCD sum rules, considering SU(3) and heavy quark symmetries, and explores their possible configurations.

Findings

Predicted masses for $ ext{η}_c' ext{f}_0(980)$, $ ext{η}_c' ext{σ}(400-1200)$, $ ext{η}_b''' ext{f}_0(980)$, and $ ext{η}_b''' ext{σ}(400-1200)$.

Analysis of these states independent of hadro-charmonium and molecular interpretations.

Application of QCD sum rules considering flavor and heavy quark symmetries.

Abstract

In this article, we study the pseudoscalar bound state $\eta_c'f_0(980)$ (irrespective of the hadro-charmonium and the molecular state) with the QCD sum rules. Considering the SU(3) symmetry of the light flavor quarks and the heavy quark symmetry, we also study the bound states $\eta_c'\sigma(400-1200)$, $\eta_b'''f_0(980)$ and $\eta_b'''\sigma(400-1200)$, and make reasonable predictions for their masses.