A method for the separation and reconstructions of charged hadron and neutral hadron from their overlapped showers in electromagnetic calorimeter

TL;DR

This paper presents a novel method combining shower clustering and parametric formulas to effectively separate and reconstruct overlapped charged and neutral hadron showers in electromagnetic calorimeters, improving tau decay analysis at the LHC.

Contribution

The paper introduces a new technique for separating overlapped hadron showers using combined clustering and parametric modeling, enhancing tau reconstruction accuracy.

Findings

Effective separation of overlapped showers achieved

Improved energy and position reconstruction of hadrons

Enhanced tau decay analysis at the LHC

Abstract

The separation and reconstructions of charged hadron and neutral hadron from their overlapped showers in electromagnetic calorimeter is very important for the reconstructions of some particles with hadronic decays, for example the tau reconstruction in the searches for the Standard Model and supersymmetric Higgs bosons at the LHC. In this paper, a method combining the shower cluster in electromagnetic calorimeter and the parametric formula for hadron showers, was developed to separate the overlapped showers between charged hadron and neutral hadron. Taking the hadronic decay containing one charged pion and one neutral pion in the final status of tau for example, satisfied results of the separation of the overlapped showers, the reconstructions of the energy and positions of the hadrons were obtained. An improved result for the tau reconstruction with this decay model can be also achieved after the application of the proposed method.