The Institute of Nuclear and Particle Physics (INPP) presents Huey-Wen Lin, of Michigan State University, on “Parton Distribution Functions From Lattice QCD” on Tuesday, Sept. 19, at 4 p.m. in Edwards Accelerator Lab, Roger W. Finlay Conference Room.
Huey-Wen Lin
Abstract: Studying the structure of nucleons is not only important to understanding the strong interactions of quarks and gluons, but also to improving the precision of new-physics searches. Indeed a broad class of experiments, including the LHC and dark-matter detection, requires Standard-Model backgrounds with parton distribution functions (PDFs) as inputs for disentangling SM contributions from potential new physics. For a long time, lattice calculations of the PDFs (as well as many hadron structures) have been limited to the first few moments.
In this talk, we present a first direct calculation of the Bjorken-x dependence of the PDFs using Large-Momentum Effective Theory (LaMET). An exploratory study of the antiquark/sea flavor asymmetry of these distributions will be discussed. This breakthrough opens an exciting new frontier calculating more complicated quantities, such as gluon structure and transverse-momentum dependence, which will complement existing theoretical programs for the upcoming Electron-Ion Collider (EIC).
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