My research involves the study of the properties of the nucleon and of nuclei at the quark level. In this research, the Drell-Yan process is exploited to probe selectively the antiquark distributions of the target nuclei. In Fermilab E866/NuSea, this technique was used to determine the ratio of anti-d to anti-u quarks in the proton, which showed a surprisingly large flavor asymmetry in the sea quark distributions. I am a co-spokespersons of Fermilab E-906/SeaQuest which will use a proton beam extracted from the Fermilab Main Injector to extend this measurement with significantly better statistical precision to larger values of x_Bj. E906 will also examine the antiquark distributions in nuclei, looking for an antiquark excess which would signal the presence of nuclear pions; absolute Drell-Yan cross sections as a measurement of the absolute magnitude of the sea quark distributions; and partonic energy loss in cold nuclear matter. As a member of the HERMES collaboration, I participate in the study of the longitudinal and transverse spin distributions of quarks in the nucleon.

I am also interested in studies of fundamental electroweak symmetries. These can be accessed at low energies using the CEBAF accelerator at the Thomas Jefferson National Accelerator Facility (JLab). I am co-spokesperson on two proposals, the 6 GeV PV-DIS E08-011 and the 12 GeV PVDIS (E12-07-102) that will together use Parity Violating Deep Inelastic Scattering to measure sin²θ_W and the quark-electron C_2q coupling constants.