Exotic B_c-like molecules in QCD Sum Rules

TL;DR

This paper employs QCD sum rules to predict the masses of potential $B_c$-like molecular states with specific quantum numbers, considering condensate contributions up to dimension eight at leading order.

Contribution

It introduces a detailed QCD sum rule analysis for $B_c$-like molecules, including higher-dimension condensates and specific quantum states, providing mass estimates around 7 GeV.

Findings

Masses around 7 GeV for the studied states

Consideration of condensates up to dimension eight

Leading order in ${eta}_s$ used in calculations

Abstract

We use the QCD sum rules to study possible $B_c$-like molecular states. We consider isoscalar $J^P = 0^+$ and $J^P = 1^+ D^{(\ast)}B^{(\ast)}$ molecular currents. We consider the contributions of condensates up to dimension eight and we work at leading order in ${\alpha}_s$ . We obtain for these states masses around 7 GeV.