Research

ATLAS - high energy proton-proton collisions at the LHC at CERN.

BaBar Detector

ATLAS is an international collaboration of scientists currently operating a particle detector that is probing nature at the TeV energy scale. ATLAS is study proton-proton collisions at a center of mass energies of 7 and 8 TeV that will be provided by the Large Hadron Collider (LHC) , at the European Laboratory for Particle Physics, CERN. Recently the ATLAS experiment discovered evidence for the Higgs boson.

High Energy Physics Research Computing

My research team is actively involved in computing projects that enhance and enable our particle physics research. A complete description of our activities can be found on HEP Research Computing web site. A brief summary is given below.

I am currently the Director of HEPnet/Canada , which is responsible for national and international HEP networks in Canada. HEPNET coordinates the ATLAS-Canada network, which has links from the ATLAS Tier-1 centre in TRIUMF to the Tier-2 centres in McGill, Toronto, Edmonton, SFU and Victoria, as well as links to CERN and other centres around the world. HEPNET works closely with CANARIE, who provides the research and education network in Canada.

HEPnet Network

We have made significant contributions to grid and cloud computing for particle physics research. We have helped establish the BaBar Long Term Analysis Facility that uses virtualization and cloud computing technologies to help preserve the BaBar data and analysis framework for the next 5-10 years. We have also established the first production-level ATLAS Tier-2 using a distributed set of cloud computing resources.

We also collaborate with Caltech, CANARIE, BCNET and others (including industrial partners) on pushing the limits on network technologies. Our group has set new world records for data transfer at the Super Computing conferences in 2011 (Seattle) and 2012 (Salt Lake City). For more information, see our Super Computing web site.

BaBar - high energy electron-positron collisions at SLAC.

BaBar Detector

The BaBar experiment collected data between 1999 and 2008 at the PEP-II asymmetric e+e- collider at SLAC . The goal of the experiment is to study the breakdown of CP symmetry (the symmetry that relates matter to anti-matter) in the decays of B mesons (particles containing the b quark). The experiment is providing precision tests of our understanding of CP violation, and is sensitive to the presence of new phenomena at much higher energy scales through the study of rare decays.

My area of interest is the study of rare tau decays. The BaBar experiment has a very large sample of tau decays, which can be used to make precision measurements of the properties of the tau lepton, test the Standard Model as well as search for evidence of new physics. My two graduate students have completed their work using tau leptons to search for evidence of CP violation in tau decays involving Kshort mesons, and making precise measurements of decay rate of rare tau decays.