Probing QCD with Photons and Jets at the ATLAS detector

Giuseppe Callea,Y Aharonov,S Kabana,L Bravina

doi:10.1051/epjconf/201818202025

Giuseppe Callea, Y Aharonov + Show 2 more

Open Access

https://doi.org/10.1051/epjconf/201818202025

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Journal: EPJ web of conferences	Publication Date: Jan 1, 2018
License type: CC BY 4.0

Affiliation: University of Calabria

Abstract

This contribution gives an overview of the recent measurements of the differential cross sections for final states involving photons and/or jets at the centre-of-mass energies of 8 and 13 TeV, published by the ATLAS Collaboration. The results are compared with several next-to-leading order calculations and with the latest predictions of various Monte Carlo generators. New measurements of transverse energy-energy correlations and their associated asymmetries in multi-jet events at 8 TeV are also presented. Both measurements are used to extract the strong coupling constant and test the renormalization group equation.

Highlights

The study of the production of jets and photons at the Large Hadron Collider (LHC) provides a powerful tool for understanding perturbative QCD
This paper presents the recent published measurements of the cross section of final states involving photons and/or jets at center-of-mass energies of 8 and 13 TeV with the data collected by ATLAS detector [2]
We present a measurement of the transverse energy-energy correlations (TEEC) and their associate asymmetries (ATEEC) in multi-jet events at 8 TeV and a method to extract αs from them

Summary

Introduction

The study of the production of jets and photons at the Large Hadron Collider (LHC) provides a powerful tool for understanding perturbative QCD (pQCD). The production of prompt photons in protonproton collisions, provides a testing ground for pQCD in a cleaner enviroment than in jet production, since the colorless photon originates directly from the hard interaction. The jet production measurements are used to contrain the gluon density in the proton and can be exploited to extract the strong coupling constant (αs) in specific final state topologies. This paper presents the recent published measurements of the cross section of final states involving photons and/or jets at center-of-mass energies of 8 and 13 TeV with the data collected by ATLAS detector [2]. We present a measurement of the transverse energy-energy correlations (TEEC) and their associate asymmetries (ATEEC) in multi-jet events at 8 TeV and a method to extract αs from them

Inclusive isolated photon production

Photon pair production

Inclusive jet production at 8 TeV

Inclusive and dijet production at 13 TeV

Transverse energy-energy correlations and αs extraction

Summary