The NA62 Liquid Krypton Electromagnetic Calorimeter Level 0 Trigger

TL;DR

This paper discusses the design and implementation of the Level 0 Trigger for the Liquid Krypton Electromagnetic Calorimeter used in the NA62 experiment at CERN, aiming to improve background suppression in rare kaon decay measurements.

Contribution

It introduces the design and current status of the Liquid Krypton Electromagnetic Calorimeter Level 0 Trigger for the NA62 experiment.

Findings

Trigger system enhances background suppression

Successful implementation of the calorimeter trigger

Improved detection efficiency for rare decay events

Abstract

The NA62 experiment at CERN SPS aims to measure the Branching Ratio of the very rare kaon decay K+ -> pi+ nu nubar collecting O(100) events with a 10% background to make a stringent test of the Standard Model. One of the main backgrounds to the proposed measurement is represented by the K+ -> pi+ pi0 decay. To suppress this background an efficient photo veto system is foreseen. In the 1-10 mrad angular region the NA48 high performance liquid krypton electromagnetic calorimeter is used. The design, implementation and current status of the Liquid Krypton Electromagnetic Calorimeter Level 0 Trigger are presented.