Large-x partons from JLab to the LHC

I discuss the recent CTEQ-JLab global QCD fits of parton distributions, focused on the region of large parton momentum fraction x. I will review the various corrections to the leading-twist perturbative calculations needed to include data in this kinematics, with a special focus on nuclear corrections. These latter are necessary to make use of Deep Inelastic Scattering data on deuteron targets and separate up and down quarks to a high level of statistical precision, but introduce large theoretical systematic uncertainties. I will discuss the consequence of these uncertainties for observables at the Tevatron and the LHC, and, conversely, I will argue how experiments at colliders (and elsewhere) may help constraining the nuclear modifications of parton distributions.

Argonne Physics Division Seminar Schedule