Simultaneously non-linear energy calibration of CMS calorimeters for single pions and electrons

TL;DR

This paper presents a non-linear energy calibration method for CMS calorimeters that improves energy resolution and linearity for pions and electrons, aiding in more accurate jet energy reconstruction.

Contribution

A novel simultaneous non-linear calibration technique for CMS calorimeters that enhances energy resolution and linearity for both pions and electrons.

Findings

Improved calorimeter energy resolution for pions.

Restored calorimeter linearity across energies.

Effective calibration for jet energy reconstruction.

Abstract

CMS calorimeter energy calibration was done in the full CMS simulated geometry for the pseudorapidity region eta = 0. The samples of single pion events were generated with a set of incident energies from 5 GeV to 3 TeV and for single electrons from 5 to 500 GeV. The analysis of the simulated data shows that standard calibration using just sampling coefficients for calorimeter parts with different sampling ratio gives nonlinear calorimeter response. Non-linear calibration technique was applied simultaneously for pion and electron beams which is preparation for jets energy reconstruction. It improve calorimeter energy resolution for pions and restore the calorimeter linearity.