Longitudinal Hadronic Shower Development in a Combined Calorimeter

TL;DR

This paper experimentally investigates the longitudinal development of hadronic showers in a combined calorimeter, compares the data with existing models, and proposes modifications to improve the description accuracy.

Contribution

It introduces a modified parameterization of shower development that accounts for e/h ratios, improving the fit to experimental data in a combined calorimeter.

Findings

Original Bock parameterization does not fit well

Modified parameterization with e/h ratios improves agreement

Experimental data covers a wide energy range from 10 to 300 GeV

Abstract

This work is devoted to the experimental study of the longitudinal hadronic shower development in the ATLAS barrel combined prototype calorimeter consisting of the lead-liquid argon electromagnetic part and the iron-scintillator hadronic part. The results have been obtained on the basis of the 1996 combined test beam data which have been taken on the H8 beam of the CERN SPS, with the pion beams of 10, 20, 40, 50, 80, 100, 150 and 300 GeV/c. The degree of description of generally accepted Bock parameterization of the longitudinal shower development has been investigated. It is shown that this parameterization does not give satisfactory description for this combined calorimeter. Some modification of this parameterization, in which the e/h ratios of the compartments of the combined calorimeter are used, is suggested and compared with the experimental data. The agreement between such parameterization and the experimental data is demonstrated.