WNPPC2024 - 61st Winter Nuclear Particle Physics Conference

Session

Morning 3 - Feb. 17, 2024

Feb 17, 2024, 8:25 a.m.

Salon AB (Hotel Chateau Bromont)

Conveners

Morning 3 - Feb. 17, 2024

• Alain Bellerive (Carleton University)

142. Welcome and notes

2024-02-17, 8:25 a.m.

150. What Has the LHC Taught Us about the Standard Model?

Prof. Heather Russell (University of Victoria)

2024-02-17, 8:30 a.m.

Particle Physics

Invited Oral

The Large Hadron Collider at CERN has provided us with an unprecedented number of proton collisions at unprecedented energies. One of the main motivations of the LHC was the discovery of the Higgs boson, which was achieved in 2012. Now over a decade later, this begs the question: what have we been doing at the LHC since the discovery of the Higgs boson? Together, we will explore the richness...

113. First Observation of the Production of a $W$ Boson in Association with Two Photons in Proton-Proton Collisions at the Large Hadron Collider with the ATLAS Detector

Alessandro Ambler (McGill)

2024-02-17, 9:00 a.m.

Electroweak and Higgs Physics

Contributed Oral

The ATLAS detector at Large Hadron Collider (LHC) at CERN has collected $140~\mathrm{fb}^{-1}$ of proton-proton collisions over the course of the 2015-2018 data-taking period, allowing for some of the most stringent tests of the Standard Model of particle physics and new measurements of its parameters with unprecedented accuracy. This presentation details the first observation of the...

99. Identifying New Long-Lived Particles (LLPs) Using Graph Neural Networks with the ATLAS Detector

Paras Pokharel (Simon Fraser University)

2024-02-17, 9:15 a.m.

Contributed Oral

Many extensions to the Standard Model (SM) predict the existence of strongly interacting dark sectors, which behave similarly to Quantum Chromodynamics (QCD) but interact weakly with SM particles. Depending on the parameters of the dark sector, one potential LLP signature could be that of an "emerging jet" – a spray of particle tracks after proton-proton collision dominantly composed of...

116. ATLAS Liquid Argon Calorimeter Upgrades for High-Luminosity LHC

Laura Gonzalez Escudero (McGill University)

2024-02-17, 9:30 a.m.

Contributed Oral

The Large Hadron Collider (LHC) at the Conseil Européen pour la Recherche Nucléaire (CERN) features a 27km ring of superconducting magnets that accelerate protons into extremely high-energy collisions to probe for new physics. Found along the ring is ATLAS (A Toroidal LHC ApparatuS), a cylindrical multi-purpose detector with various subsystems. At the heart of the detector, the electromagnetic...

123. Search for Emerging Jets with the ATLAS Detector at the LHC

Ian Ramirez-Berend (Carleton University)

2024-02-17, 9:45 a.m.

Contributed Oral

A search for a novel experimental collider signature called 'Emerging Jets' is presented using the ATLAS experiment at the Large Hadron Collider. This signature is based on a model of 'Dark-QCD' wherein dark quarks will shower and hadronize analogous to quantum chromodynamics (QCD) in the Standard Model (SM). If produced in particle collisions, these dark particles would form dark-jets:...