Bb̄ ud̄ four-quark systems in the Born-Oppenheimer approximation: Prospects and challenges

Abstract

We summarize previous work on b̄ b̄ ud four-quark systems in the Born-Oppenheimer approximation and discuss first steps towards an extension to the theoretically more challenging bb̄ ud̄ system. Strategies to identify a possibly existing bb̄ ud̄ bound state are discussed and first numerical results are presented.