EPJ Web of Conferences 28, 12066 (2012)
https://doi.org/10.1051/epjconf/20122812066

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

LNF-INFN

^a e-mail: marianna.testa@lnf.infn.it

Abstract

The measurement of the missing transverse energy (E_T^miss ) is fundamental for many analyses at LHC. Good E_T^miss resolution and calibration are essential for searches of new physics as well as precise measurements. We describe a refined reconstruction and calibration of E_T^miss 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 E_T^miss , fundamental for determining systematic uncertainties in all analysis involving E_T^miss measurements, is also presented.