$\{Q\bar{q}\}\{\bar{Q}^{(')}q\}$ molecular states

TL;DR

This paper systematically studies the masses of heavy-light molecular states with specific quark configurations using QCD sum rules, including operator contributions up to dimension six, and proposes related interpolating currents.

Contribution

It introduces new interpolating currents for these molecular states and provides mass spectra calculations within the QCD sum rule framework, including higher-dimensional operator contributions.

Findings

Mass spectra for $ ext{Q}ar{ ext{q}} ext{Q}'ar{ ext{q}}$ states are obtained.

Operator contributions up to dimension six are included in the analysis.

The study offers theoretical predictions for the masses of these molecular states.

Abstract

Masses for $\{Q\bar{q}\}\{\bar{Q}^{(')}q\}$ molecular states are systematically studied in QCD sum rules. The interpolating currents representing the related molecular states are proposed. Technically, contributions of the operators up to dimension six are included in operator product expansion (OPE). Mass spectra for molecular states with $\{Q\bar{q}\}\{\bar{Q}^{(')}q\}$ configurations are obtained.