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Lilianna Hariasz (Simon Fraser University)19/06/2026, 11:15Particles and FieldsContributed Talk
In the continued search for dark matter (DM), community interest has extended beyond the standard weakly-interacting-massive-particle paradigm to a richer set of scenarios and detection opportunities. A major focus of upcoming DM searches involves light dark matter (LDM): a class of candidates with masses on the electron to proton scale, characterized by a massive dark photon which mixes...
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James Cline (McGill University, (CA))19/06/2026, 11:35Particles and FieldsContributed Talk
It has long been believed that ordinary neutrinos cannot be the dark
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matter of the Universe. We present a loophole that allows for
neutrinos to be dark matter in the bulk of the Universe, while a light
scalar field, that can decay into neutrinos, is the main dark matter
component in galaxies, so that the Tremaine-Gunn limit is
satisfied. The cosmic neutrino background would have 100... -
Andrey Shkerin19/06/2026, 11:55Particles and FieldsContributed Talk
I will discuss dynamical effects during critical bubble nucleation in thermal first-order phase transitions. These effects arise due to lack of local thermal equilibrium and affect the parameters of the transition including the nucleation rate. I will present a general method of calculating the thermal nucleation rate that accounts both for statistical and dynamical effects. I will also...
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Tianyi Xie (McGill University)19/06/2026, 12:15Particles and FieldsContributed Talk
We investigate a classically conformal extension of the Standard Model Higgs sector as a solution to the gauge hierarchy problem, in which electroweak symmetry breaking proceeds radiatively via the Gildener–Weinberg mechanism. In the minimal realization, two additional scalars are introduced: the first acquires a vacuum expectation value and mixes with the Standard Model Higgs, while the...
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Dr Maryam Bibi (St. Francis Xavier University)19/06/2026, 16:00Particles and FieldsContributed Talk
We study the impact of Vector-Like Quarks (VLQs) on rare B-decay processes using updated lower mass bounds from LHCb to define a viable VLQ mass window. Combining symbolic and numerical calculations of one-loop effective vertices within and beyond the Standard Model, we evaluate VLQ contributions to rare decay amplitudes. By comparing our results with recent LHCb and Belle II measurements, we...
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Mohammad Ahmady19/06/2026, 16:20Particles and FieldsContributed Talk
Rare decays of B mesons provide a powerful window into physics beyond the Standard Model, offering complementary sensitivity to direct searches at high-energy colliders. With major contributions from the B factories (BaBar and Belle) and the ongoing high-precision program at LHCb, complemented by the rapidly accumulating data from Belle II, these processes have delivered some of the most...
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Alex Todd (McGill University)19/06/2026, 16:40Particles and FieldsContributed Talk
Neutrinoless double-beta ($0\nu\beta\beta$) decay is a key probe of lepton-number violation, the Majorana nature of neutrinos and their absolute mass scale. As upcoming experiments extend half-life sensitivities by up to two orders of magnitude, reliable calculations of nuclear matrix elements (NMEs) are essential to constrain neutrino masses and underlying decay mechanisms. The standard decay...
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Rida Boumris (Montreal university)19/06/2026, 17:00Particles and FieldsContributed Talk
Latest measurements of branching ratios, related to hadronic decays of $B$ meson to charm and pseudo-scalar final states ($DP$), showed disagreements with theoretical predictions of QCD factorization. Meanwhile, SU(3) symmetry-breaking was found in recent studies to exceed the Standard Model threshold of 30% (in $B$ decays to two pseudo-scalars). In the light of these results, an analysis of...
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Celina Pasiecznik (McGill University)20/06/2026, 11:15Particles and FieldsContributed Talk
We derive bounds on Wilson coefficients in gravitational effective field theories using fully crossing symmetric dispersion relations. These sum rules naturally isolate finite subsets of low-energy couplings without relying on the forward limit or specific high-energy completions. We validate our method by matching bounds computed previously for scalar scattering with gravity as well as for...
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Prof. Ruben Sandapen (Acadia University)20/06/2026, 11:35Particles and FieldsContributed Talk
We present a three-dimensional holographic picture of the pion in which both confinement and chiral symmetry breaking play important roles. We show that the internal transverse and longitudinal light-front QCD dynamics in the pion map onto the IR and UV limits of the scalar field equation of motion in 5-dimensional anti de Sitter spacetime (AdS) deformed by a quadratic dilaton. While conformal...
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Cyrus Robertson Orkish20/06/2026, 11:55Particles and FieldsContributed Talk
Recently, various authors have studied the vacua of strongly coupled field theories via the introduction of anomaly mediated supersymmetry breaking (AMSB) to supersymmetric (SUSY) gauge theories. This technique is powerful but it is known that in some cases, there is a phase transition as the SUSY-breaking scale crosses the confinement scale. We introduce AMSB to $\mathcal{N}=2$ SQCD...
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Dr Zechuan Zheng (Perimeter Institute)20/06/2026, 12:15Particles and FieldsContributed Talk
The analytic functional approach has revealed fruitful new geometric features in higher-dimensional CFTs (particularly in 3D CFTs) that had not been seen before. We want to discuss its applications to the 3D conformal bootstrap and how it uncovers new structures such as kinks, plateaus, and “volcano”-like features.
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