Conveners
(PPD) M2-1 Collider 1 | Collisionneur 1 (PPD)
- Katherine Pachal
The Large Hadron Collider restarted collisions at $\sqrt{s}$ = 13.6 TeV in 2022, beginning the start of a planned 4-year Run 3. The ATLAS experiment is now commissioning several upgraded detector systems to best take advantage of the new dataset, including the New Small Wheels and phase-1 liquid argon electronics upgrade to which Canadian physicists made substantial contributions. This talk...
Top quark being the heaviest elementary particle, and the only quark which decays in its bare form, has the potential to reveal crucial information on particle dynamics. For example, precise measurement of top quark mass is needed to understand the vacuum structure, including its stability. Having the strongest coupling with Higgs boson, it can reveal information related to the electroweak...
As the heaviest known fundamental particle, the top quark plays a special role in many theories of new physics beyond the Standard Model. Reconstruction of top anti-top pair production to the best possible resolution is therefore crucial to enhancing our sensitivity to Beyond Standard Model effects in precision measurements and searches at the Large Hadron Collider (LHC), from improved mass...
We use the newly proposed Energy Mover’s Distance as a measure of jet isotropy to define new jet substructure observables for quark/gluon discrimination and identifying hadronically-decaying top quarks with large transverse momentum. We assess their effectiveness by comparing them with other classifiers. The quark/gluon study is conducted at hadron level while the top quark study is conducted...
The $t$-channel single-top quark production is observed for the first time at a centre-of-mass energy of 5.02 TeV using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider. The observation is made using an event selection optimized for the $l$+jets decay topology of the single-top process, which requires candidate events to have exactly one charged lepton...
