Missing transverse energy performance of the CMS detector

TL;DR

This paper evaluates the CMS detector's ability to measure missing transverse energy during 7 TeV proton-proton collisions, focusing on scale, resolution, anomalies, and algorithm performance.

Contribution

It provides a comprehensive analysis of missing transverse energy measurement performance and introduces an algorithm for assessing the significance of missing energy.

Findings

Measured scale and resolution of missing transverse energy

Studied effects of multiple interactions on measurements

Compared various reconstruction algorithms

Abstract

During 2010 the LHC delivered pp collisions with a centre-of-mass energy of 7 TeV. In this paper, the results of comprehensive studies of missing transverse energy as measured by the CMS detector are presented. The results cover the measurements of the scale and resolution for missing transverse energy, and the effects of multiple pp interactions within the same bunch crossings on the scale and resolution. Anomalous measurements of missing transverse energy are studied, and algorithms for their identification are described. The performances of several reconstruction algorithms for calculating missing transverse energy are compared. An algorithm, called missing-transverse-energy significance, which estimates the compatibility of the reconstructed missing transverse energy with zero, is described, and its performance is demonstrated.