The ATLAS detector upgrade for the HL-LHC, scheduled to begin operation in 2029, is an ambitious program to extend the LHC physics program of discoveries and measurements with a record luminosity of high-energy parton collisions. Canadian institutions are playing a leading role in designing, building, and commissioning the upgraded detector, including the charged-particle Inner Tracker, the...
As we approach the beginning of the High Luminosity Large Hadron Collider (HL-LHC) by the decade’s end, the computational demands of traditional collision simulations have become untenably high. Current methods, relying heavily on Monte Carlo simulations for event showers in calorimeters, are projected to require millions of CPU-years annually, a demand far beyond current capabilities. This...
PIONEER is a next-generation pion decay experiment that has been approved as high priority at the Paul Scherrer Institute in Switzerland. Building on the former PIENU experiment at TRIUMF, which to date provides the most precise measurement of the ratio of pion decays to electrons compared to muons $\left(R_{e/\mu}\right)$, PIONEER aims to improve this $R_{e/\mu}$ measurement by at least an...
High-resolution, high-granularity calorimetry plays a crucial role in the advancement of modern particle detectors. These detectors are crucial for precise measurements across a broad spectrum of physics phenomena, including the potential detection of dark matter and supersymmetry particles. The CALICE international collaboration has developed scalable calorimeter prototypes to meet the...
Long-Lived Particles (LLPs) beyond the Standard Model 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...
