Better theory for the intensity frontier
Particle physicists like to divide their research into“frontiers”, such as the “Energy Frontier” or the “Cosmic Frontier”. The “Intensity Frontier” involves pushing the limits of how many particles we can produce so that extremely large statistical samples can be gathered. With a massive statistical sample as the goal, there is not always room for compromise to make the experiment theoretically clean. Complex nuclei are often used as targets, forcing a good theoretical description to necessarily straddle the gap between nuclear and particle physics.
My current interests largely focus on neutrinonucleus cross sections with an emphasis on QED effects, and on the process of radiative muon capture (relevant for Mu2e and COMET). Both of these problems involve an interplay between well established theory (QED) and nontrivial nuclear effects. I have previously worked on Standard Model calculations of neutrino trident production, a rare process that can be used to search for new physics.
Ongoing work
 Estimates of RMC spectra in the near endpoint region for aluminum27.
 Coulomb corrections for internal pairproduction in the vicinity of a nucleus.
 Coulomb corrections to charged current neutrinonucleus scattering.
Papers:
 Flavor dependent radiatiative corrections to coherent elastic neutrino nucleus scattering, JHEP 97 (2021),
 High energy spectrum of internal positrons from radiative muon capture on nuclei, Phys. Rev. D 103 033002 (2021)
 Neutrino trident production at the intensity frontier, Phys. Rev. D. 95 073004 (2016)
Cosmic rays as a source of new physics
Cosmic rays are a natural and perpetual source of any particle that can be produced in a protonproton collision. They consequently offer a probe of physics Beyond the Standard Model that compliments collider searches. Although the flux of cosmic rays falls of steeply with increasing kinetic energy, there still exists a nonzero flux even at very high incident energies.
Papers:
 Millicharged cosmic rays and low recoil detectors,Phys. Rev. D. 103, 075029 (2021)
 Millicharged particles in neutrino experiments, Phys. Rev. Lett. 122 071801 (2018)
BSM physics with neutrinos
In the absence of any observed signal of new physics we can conclude that any new particles, should they exist, must either be very heavy (above roughly the TeV scale) or very weakly interacting. The second option permits one to consider new particles with masses in the MeVGeV regime that are very weakly interacting. It turns out that neutrino experiments are a great place to look for these particles since they are optimized to study the Standard Model’s own “dark” particle.
I have worked on models of new physics involving “neutrino portals” (where new particles couple to neutrinos) and other feebly interacting particle scenarios. I am generally interested in the ability to repurpose existing facilities to help shed light on models of a hypothetical dark sector, but also in using natural sources of neutrino beams such as atmospheric and solar neutrinos.
Papers:
 Luminous solar neutrinos II: Massmixing portals (2020)
 Luminous solar neutrinos I: Dipole portals (2020)
 Millicharged particles in neutrino experiments, Phys. Rev. Lett. 122 071801 (2018)
 Probing new charged scalars with neutrino trident production, Phys. Rev. D 97, 055003 (2017)
 Consequences of an Abelian Z’ for neutrino oscillations and dark matter, Physical Review D. 93 03501 (2016)
 Quantum effects in the Hamiltonian Mean Field model, (2019), Ph.D. Thesis, McMaster University.
 The implications of gauging lepton flavour symmetries for dark matter and neutrino masses, (2015), M.Sc. Thesis, McMaster University
Point particle effective field theory and absorptive systems
PPEFT aims to systematize the analysis of “bulk” fields interacting with compact objects (or branes). In any fieldtheory in a finite domain some boundarycondition must be imposed on the system. The idea is to provide a localized action describing the “point particle’s” interaction with the bulk field and it is this action that completely determines the boundary condition to be applied to the bulk field (in coordinate space). The action is ordered via a power counting scheme which dictates which boundary conditions are “universal” at low energies.
A powerful, and insightful setting to understand features of PPEFT is the quantum mechanics of the inverse square potential. The inverse square potential is interesting because of a phenomena known as “fall to the centre” and has connections to
 Near horizon physics of black holes
 Efimov physics
 Conformal symmetry breaking
This project has three basic goals
 Identify how to parameterize the inverse square potential as a PPEFT, and identify a universal set of RG invariants.
 Propose an explicit proposal to realize, and test this system in a lab.
 Connect the results of any future experiment to other physical systems such as black hole and Efimov physics by using the universal parameterization mentioned above.
Papers:
 Effective field theory of black hole echoes, JHEP (2018) 2018 113
 Fall to the Centre in Atom Traps and PointParticle EFT for Absorptive Systems, JHEP (2018) 2018: 59
 Please contact me if you are interested in reading an unpublished manuscript discussing an experimental realization using cold atoms.
Hamltonian mean field model in the quantum regime (Ph.D. Thesis)
The HMF model is the toy model of longrange interacting systems (in the way the Ising model is for critical phenomena). It describes particles of mass interacting on a ring of radius by the following Hamiltonian
where is the (angular) momentum conjugate to , and is the interparticle coupling. The coupling is rescaled to ensure a nontrivial limit as , this is known as the Kac prescription.
We have been studying the quantum version of the model. Our first result was to determine the fate of the socalled bicluster two of our main results are shown below. We managed to make nonequilibrium phase diagram that demonstrates how quantum zeropoint energy modifies the dynamics, resulting in the interference pattern shown below
Papers:

 Quantum effects in the Hamiltonian Mean Field model, (2019), Ph.D. Thesis, McMaster University.
 Violent relaxation in quantum fluids with longrange interactions, Phys. Rev. E 98, 012112 (2018)
 Quantum fluctuations inhibit symmetry breaking in the HMF model, Phys. Rev. E 101 012136 (2020)
 Balancing longrange interactions and quantum pressure: Solitons in the Hamiltonian meanfield model, Phys. Rev. E 100 022216 (2019)