High Energy Physics Journal Club

Speaker: Timothy Hobbs, SMU

Title: Recent progress in modeling hadronic structure functions

Date: Thu, 07 Dec 2017, 12:00 pm – 1:00 pm
Type: Seminar
Location: 3239 BPS Bldg.

As the precision of ongoing and proposed experiments steadily grows, a limiting factor in the discovery potential of such efforts will increasingly be our knowledge of the parton distribution functions (PDFs) of the nucleon and other light hadrons; in general, a detailed knowledge of these distributions over a wide kinematical range is necessary to make accurate predictions of various Standard Model processes at colliders like the LHC and aid the search for new physics. While QCD global analyses have historically been the primary tool for constraining nucleon and nuclear PDFs, input from model-building is also necessary for the purpose of bench-marking and guidance, especially with respect to the inherently nonperturbative parts of the low momentum quark distributions, for instance. In this talk, I will highlight a number of recent calculations that illustrate insights that can be gained from modeling quark PDFs in a number of flavor sectors, particularly using the technology of light-front field theory. In addition, I will discuss the potential to extend models of this sort to investigate related quantities: the recently proposed quark quasi-distributions for which the first Lattice Gauge Theory calculations are now taking place, thus opening a novel channel for PDF determinations complementary to traditional global fits.