Physics prospects for ATLAS at the HL-LHC

J Nielsen

doi:10.1088/1742-6596/1690/1/012156

Abstract

The ATLAS experiment at CERN will undergo a series of detector upgrades over the next few years to prepare for the the High-Luminosity Large Hadron Collider (HL-LHC) project. The upgrades are designed to maintain or improve detector performance, even with the instantaneous luminosity needed to deliver a total of 3000 fb−1 of proton-proton collision data at to ATLAS. This contribution provides details of the broad and deep program of measurements and searches planned by ATLAS for the HL-LHC. The higher centre-of-mass energy and increased integrated luminosity will allow ATLAS not only to improve the precision of Higgs boson, electroweak boson, and top quark measurements, but also to extend the sensitivity of searches for beyond-the-Standard-Model processes with small cross sections. Many of the projections use detailed detector simulations to model the performance of the proposed ATLAS detector upgrades.

Highlights

The ATLAS experiment at CERN will undergo a series of detector upgrades over the few years to prepare for the the High-Luminosity Large Hadron Collider (HL-LHC) project
The higher centreof-mass energy and increased integrated luminosity will allow ATLAS to improve the precision of Higgs boson, electroweak boson, and top quark measurements, and to extend the sensitivity of searches for beyond-the-Standard-Model processes with small cross sections
The High-Luminosity Large Hadron Collider (HL-LHC) project at CERN is the evolution of the successful LHC program

Summary

Introduction

The High-Luminosity Large Hadron Collider (HL-LHC) project at CERN is the evolution of the successful LHC program. Electroweak boson measurements, and searches for supersymmetry These studies have been performed either with a full simulation of the ATLAS detector upgrades or with extrapolation from results obtained from Run 2 LHC data. The measurements can be interpreted as searches for high-mass diboson resonances, with a discovery reach of up to 4.9 TeV in certain simplified models of heavy gauge bosons [7]. Even though these inclusive scattering cross sections can be measured with good precision, the measurement of longitudinal W boson scattering is still expected to be a challenge. More detailed studies of experimental and theory uncertainties will be needed to improve the sensitivity

Theoretical sources of uncertainty Systematic sources of uncertainty

Stat Syst ggF

Soft leptons