The NA62 Liquid Krypton Electromagnetic Calorimeter Level 0 Trigger
Vincenzo Bonaiuto, Adolfo Fucci, Giovanni Paoluzzi, Andrea Salamon,, Gaetano Salina, Emanuele Santovetti, Fausto Sargeni, Francesco M. Scarfi'

TL;DR
This paper describes the design and implementation of the Level 0 trigger system for the Liquid Krypton Electromagnetic Calorimeter used in the NA62 experiment at CERN, aimed at detecting rare kaon decays.
Contribution
It introduces a novel Level 0 trigger system for the Liquid Krypton Calorimeter, enhancing background suppression in rare decay measurements.
Findings
Trigger system successfully implemented and tested
Improved background rejection capabilities
Enhanced detection efficiency for rare decays
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.
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