# Particle Identification with the TOP and ARICH detectors at Belle II

## TL;DR

This paper discusses the particle identification system at Belle II, focusing on two Cherenkov detectors—the TOP and ARICH—and presents their design, performance, and construction status.

## Contribution

It introduces the combined use of TOP and ARICH detectors for enhanced particle identification at Belle II, detailing their features and performance evaluations.

## Key findings

- Performance studies of the detectors are presented.
- Construction progress of the detectors is reported.
- The detectors' key features are highlighted.

## Abstract

Particle identification at the Belle II experiment will be provided by two ring imaging Cherenkov devices, the time of propagation counters in the central region and the proximity focusing RICH with aerogel radiator in the forward end-cap region. The key features of these two detectors, the performance studies, and the construction progress is presented.