# Towards a complete angular analysis of the electroweak penguin decay $\Lambda^0_b\to p h^-\ell^+\ell^-$

## TL;DR

This paper develops a comprehensive angular analysis method for the rare baryonic decay $ ext{Lambda}_b^0 o p h^- ext{l}^+ ext{l}^-$ using moments technique, providing a robust approach suitable for low-statistics scenarios.

## Contribution

It introduces a complete set of 32 orthonormal moments for analyzing the decay, avoiding likelihood fit ambiguities and enhancing analysis robustness.

## Key findings

- Full set of 32 moments provided for decay analysis
- Method is robust under low statistics conditions
- Avoids ambiguity issues inherent in likelihood fits

## Abstract

We investigate the rare electroweak penguin transition $b \to s \ell^+ \ell^-$ though angular analyses in baryonic $b$-decays. Instead of performing likelihood fits, that might suffer from ambiguity issues, we employ the moments technique, which is a simple counting experiment. The method is known to be robust under low statistics conditions and avoids the ambiguity problem by construction. We provide the full set of 32 orthonormal moments for $\Lambda^0_b\to p h^-\ell^+\ell^-$, where $h\in\{\pi,K\}$, for a polarized $\Lambda^0_b$ and the dihadron system $[ph]$ being in a spin-1/2 state.