Research

I work in high-energy phenomenology, and have particular interests in model building, effective field theories, supersymmetry, Higgs phenomenology, low-energy nuclear interactions, and dark matter.

Current projects include investigating general constraints on composite naturalness models, searching for new physics in the polarization of heavy mesons, and updating cross sections for quasielastic neutrino–nucleon scattering.

With Yael Shadmi, Sho Iwamoto, and other collaborators, we have/are investigating

  • benchmark points and collider signatures for scenarios in flavoured gauge mediation,
  • bound state explanations for the early Run II diphoton excess at the LHC,
  • non-Abelian dark matter models.

I have been involved in a program of precision calculations of the mass of the Standard Model-like Higgs boson (discovered at the LHC in 2012) using effective field theory applied to certain scenarios of heavy supersymmetry. This work is done in collaboration with Patrick Draper and Carlos Wagner. With these techniques, we are able to use the Higgs mass to constrain the parameter space in the neutral, CP-even MSSM Higgs sector. A Mathematica package, MhEFT, is available here.

With Richard Hill and John Arrington, we have reanalyzed the available elastic electron-proton scattering data to examine the proton radius puzzle (an accessible explanation of the puzzle is available here in a Scientific American blog post). Together with Zhihong Ye, we have also provided a new parameterization of the nucleon electromagnetic form factors, which will be useful for a wide variety of experimentalists in the nuclear, neutrino, and AMO physics communities. Using techniques from heavy quark effective theory, we have also constructed the Lagrangian in non-relativistic QED (NRQED) for a heavy particle interacting with the electromagnetic field to the highest order.

During my undergraduate years, I was involved in the following projects:

  • 2006: I worked on the commissioning of the TIGRESS gamma-ray detector on the ISAC beamline at TRIUMF.
  • 2005: I designed and built electronics for resistivity measurements in a dilution refrigerator for the low-temperature laboratory run by Stephen Julian.
  • 2004: I analyzed climatological data in relation to large-scale atmospheric patterns (NAO and SAM) with Paul Kushner.