B physics: I have worked on many topics in B physics in the past. Topics include:
Determination of |Vub| and |Vcb|
Calculation of higher order corrections in inclusive B decays
Understanding non-leptonic B decays using effective theories
Effective theories:
Construction of soft-collinear effective theory
Factorization proofs for various processes
Cosmology:
Generation of density perturbations
Jet physics:
Understanding non-perturbative effects in event shape distributions
Using SCET to systematically improve parton showers and event generators