2026 CAP Congress / Congrès de l'ACP 2026

Session

(PPD) T1-11 | (PPD)

T1-11

23 Jun 2026, 10:15

U. Ottawa - Learning Crossroads (CRX) Building

977. Probing Long-Lived Particles at the HL-LHC with the MATHUSLA Experiment

Miriam Diamond

23/06/2026, 10:15

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

Beyond the Standard Model Long-Lived Particles (LLPs) appear in many theoretical frameworks that address fundamental questions such as the hierarchy problem, dark matter, neutrino masses, and the baryon asymmetry of the universe. The LHC may in fact be producing copious numbers of neutral LLPs with masses above a GeV, only to have these sneaky particles escape the main detectors without being...

500. Switched At Birth: Born Lepton Assignment of Semileptonic $t\bar{t}H$ Events

Ian Alejandro Ramirez-Berend (Carleton University (CA))

23/06/2026, 10:45

Particle Physics / Physique des particules (PPD)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

The Higgs decay to pairs of muons is extremely rare, yet it still provides the best opportunity to measure Higgs couplings to the second generation fermions. A recent search using the ATLAS detector on the Large Hadron Collider has established evidence for this decay at the level of $3.4~\sigma$. In this search, events are categorized based on the production mode of the Higgs boson. One such...

527. Shedding light on the dark sector with DarkLight

Laura Miller (TRIUMF)

23/06/2026, 11:00

Particle Physics / Physique des particules (PPD)

Oral (Non-Student) / Orale (non-étudiant(e))

The nature of dark matter remains one of the largest open questions in particle physics. Despite numerous theories and experimental searches, both small-scale and large-scale, it has so far remained unobserved at the particle level. The DarkLight experiment located at TRIUMF in Vancouver, Canada aims to leverage the ARIEL electron linear accelerator to search for a new dark sector force...

575. Measurement of associated production of Higgs bosons decaying to pairs of W bosons with the ATLAS detector at the Large Hadron Collider

Callum McCracken (University of British Columbia (CA))

23/06/2026, 11:15

Particle Physics / Physique des particules (PPD)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Measurements of Higgs boson production in association with a vector boson can provide direct access to the Higgs boson's couplings to vector bosons (given knowledge of the other branching fractions of the Higgs), providing stringent tests of the Standard Model of Particle Physics. In this talk, I will focus on associated production of Higgs bosons (VH) decaying to pairs of W bosons (H -> WW*)....

555. Studying electrical petals for the ATLAS Inner Tracker Upgrade using a micro-focused X-ray beam

Matthew Basso (TRIUMF (CA))

23/06/2026, 11:30

Particle Physics / Physique des particules (PPD)

Oral (Non-Student) / Orale (non-étudiant(e))

For the High-Luminosity Upgrade of the Large Hadron Collider, the ATLAS experiment will replace its current Inner Detector with the all-silicon Inner Tracker (ITk), which consists of pixel and strip systems. Relative to the current detector, the ITk features larger forward coverage, an order-of-magnitude increase in granularity, and improved radiation hardness. The ITk strip system's forward...

775. Systematics and Calibration for the KDK+ experiment

Cameron Ingo (Queen's)

23/06/2026, 11:45

Particle Physics / Physique des particules (PPD)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

KDK and KDK+ research is focused on measuring the rare decays of Potassium-40
(40K). The KDK experiment recently recorded the first experimental measurement
of 40K electron capture decay directly to the ground state of 40Ar. KDK+ will follow
this with an experiment aimed at obtaining a refined experimental decay constant
for the β+ decay in 40K as the currently accepted value is in tension...