Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.06607 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- We use antistatic-antistatic potentials computed with lattice QCD and a coupled-channel Born-Oppenheimer approach to explore the existence of a $\bar{b} \bar{b} u d$ tetraquark resonance with quantum numbers $I(J^P) = 0(1^-)$. A pole in the $\mbox{T}$ matrix signals a resonance with mass $m = 2 m_B + 94.0^{+1.3}_{-5.4} \, \text{MeV}$ and decay width $Γ= 140^{+86}_{-66} \, \text{MeV}$, i.e. very close to the $B^\ast B^\ast$ threshold. We also compute branching ratios, which clearly indicate that this resonance is mainly composed of a $B^\ast B^\ast$ meson pair with a significantly smaller $B B$ contribution. By varying the potential matrix responsible for the coupling of the $B B$ and the $B^\ast B^\ast$ channel as well as the $b$ quark mass, we provide additional insights and understanding concerning the formation and existence of the resonance. We also comment on the importance of our findings and the main takeaways for a possible future full lattice QCD investigation of this $I(J^P) = 0(1^-)$ $\bar{b} \bar{b} u d$ tetraquark resonance.