Missing ET Performance in ATLAS

TL;DR

This paper details the reconstruction and calibration of missing transverse energy in ATLAS, crucial for SUSY searches, and evaluates measurement quality across various simulated processes with and without physical missing energy.

Contribution

It introduces methods for reconstructing and calibrating missing transverse energy in ATLAS and assesses their performance in different simulated physics processes.

Findings

Calibration methods improve measurement accuracy

Performance varies across different physics processes

Early data expectations for measurement evaluation

Abstract

The observation and measurement of missing transverse energy in an event is a key signature in SUSY searches. This paper describes the reconstruction and calibration of missing transverse energy in ATLAS, and addresses the quality of the measurement in a variety of simulated processes which contain physical missing transverse energy such as $Z$ $\to$ $\tau^{+}\tau^{-}$, $A^{0}$ / $H^{0}$ $\to$ $\tau^{+}\tau^{-}$, $t$$\bar{t}$, and SUSY as well as processes which contain no missing transverse energy such as minimum bias and $Z$+jets. Expectations for the use of early data in evaluation of the measurement of missing transverse energy are presented.