2025 CAP Congress / Congrès de l'ACP 2025

Session

(PPD) T2-9 Particle Physics at Colliders I | Physique des particules aux collisionneurs I (PPD)

T2-9

10 Jun 2025, 14:15

Conveners

(PPD) T2-9 Particle Physics at Colliders I | Physique des particules aux collisionneurs I (PPD)

• Matthew Basso (TRIUMF (CA))

279. Recent Highlights in Higgs Physics with the ATLAS Experiment

Jiayi Chen (Simon Fraser University (CA))

10/06/2025, 14:15

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

The discovery of the Higgs boson in 2012 by the ATLAS and CMS experiments at the Large Hadron Collider (LHC) marked a major milestone in particle physics. Since then, Standard Model (SM) Higgs processes have been studied with unprecedented precision, extending into kinematically challenging regimes and rare production and decay modes. These precision measurements not only test the SM but also...

354. Effectively Exploring New Physics: EFT interpretation of ATLAS Run-2 data on the WZ → llνl channel

Maheyer Jamshed Shroff (University of Victoria (CA))

10/06/2025, 14:45

Particle Physics / Physique des particules (PPD)

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

In the framework of the Standard Model Effective Field Theory (SMEFT), the Standard Model can be seen as a low-energy approximation of a deeper, more fundamental theory that introduces new heavy particles at a higher energy scale, $\Lambda$. By integrating out these beyond-the-Standard-Model (BSM) particles, SMEFT offers a model-independent way to describe their potential effects.

This talk...

241. Machine learning techniques for mass-independent event classification in a search for singly- and doubly-charged Higgs bosons with ATLAS at the LHC

Adrienne Jean Scott (University of Victoria (CA))

10/06/2025, 15:00

Particle Physics / Physique des particules (PPD)

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

In 140$~$fb$^{-1}$ of proton-proton collision data recorded by the ATLAS detector in Run 2 of the LHC, an excess was observed in both the W$^{\pm}$Z and W$^{\pm}$W$^{\pm}$ channels with a combined global significance of 2.5 standard deviations. This excess could be attributed to the production of singly- and doubly-charged Higgs bosons, which are hypothesized by the Georgi-Machacek$~$(GM)...

113. Low mass visible dark photon search at Belle II

Ijeong Na (University of Manitoba)

10/06/2025, 15:15

Particle Physics / Physique des particules (PPD)

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

The Belle II experiment has accumulated 575 fb⁻¹ of data from the SuperKEKB asymmetric electron-positron collider. We present the current status of the search for low-mass dark photons (A′) from $e^+e^- \rightarrow A'\gamma \rightarrow e^+e^-\gamma $reaction based on collision data recorded by the Belle II experiment. The dark photon is a hypothetical gauge boson that would appear as a narrow...

191. Shining (Dark)Light on Interactions with the Dark Sector

Gabby Gelinas (UBC/TRIUMF)

10/06/2025, 15:30

Particle Physics / Physique des particules (PPD)

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

Despite dark matter’s existence and high abundance in our universe being well supported by cosmological evidence, our current understanding of it is limited due to the lack of observations of dark matter interactions on the particle scale. If and how the Standard Model interacts with the dark sector remains a major open question in particle physics. The DarkLight experiment attempts to...