Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.11325 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- The first observation of a charmless purely baryonic decay, $Λ_b^{0} \to Λp \bar{p}$, is reported using the full Run 2 LHCb dataset, corresponding to an integrated luminosity of $6.0~fb^{-1}$. The branching fraction is measured relative to that of the topologically similar normalisation mode $Λ_b^{0} \to ΛK^+K^-$. A simultaneous fit to the long- and downstream-track categories yields a signal significance of $5.1σ$ after including systematic uncertainties. The relative branching fraction is measured to be $\left(5.13 \pm 1.28_{\rm stat} \pm 0.27_{\rm syst}\right)\times 10^{-2}$ in the region $m(h^+h^-)< 2.85$ GeV.