Measurements of the pseudorapidity dependence of the total transverse energy in proton-proton collisions at sqrt(s) = 7 TeV with ATLAS

TL;DR

This study measures how the total transverse energy varies with pseudorapidity in proton-proton collisions at 7 TeV, revealing discrepancies with Monte Carlo predictions especially at high |eta|.

Contribution

It provides detailed pseudorapidity-dependent transverse energy measurements in proton-proton collisions at 7 TeV using ATLAS, comparing results with various Monte Carlo models.

Findings

Monte Carlo models underestimate transverse energy at high |eta|

Measurements cover |eta| < 4.8 for different event classes

Data enhances understanding of particle production in high-energy collisions

Abstract

This paper describes measurements of the sum of the transverse energy of particles as a function of particle pseudorapidity, eta, in proton-proton collisions at a centre-of-mass energy, sqrt(s) = 7 TeV using the ATLAS detector at the Large Hadron Collider. The measurements are performed in the region |eta| < 4.8 for two event classes: those requiring the presence of particles with a low transverse momentum and those requiring particles with a significant transverse momentum. In the second dataset measurements are made in the region transverse to the hard scatter. The distributions are compared to the predictions of various Monte Carlo event generators, which generally tend to underestimate the amount of transverse energy at high |eta|.