Refined reconstruction and calibration of the missing transverse energy in the ATLAS detector

TL;DR

This paper presents a refined method for reconstructing and calibrating missing transverse energy in the ATLAS detector, improving measurement accuracy crucial for new physics searches and precise analyses at the LHC.

Contribution

The paper introduces a new reconstruction and calibration technique for missing transverse energy in ATLAS, enhancing measurement precision and systematic uncertainty control.

Findings

Improved Etmiss resolution and calibration performance.

Validated methods on Z and W boson events.

Determined absolute Etmiss scale for systematic uncertainty reduction.

Abstract

The measurement of the missing transverse energy Etmiss is fundamental for many analyses at LHC. Good Etmiss resolution and calibration are essential for searches of new physics as well as precise measurements. We describe a refined reconstruction and calibration of Etmiss developed by ATLAS and its performances on events containing Z and W bosons. The data sample was collected in proton-proton collisions at a center-of-mass energy of 7 TeV, and corresponds to an integrated luminosity of about 36 pb-1. The determination of the absolute scale of the Etmiss, fundamental for determining systematic uncertainties in all analysis involving Etmiss measurements, is also presented.