[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Wed., March 1, 2017
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

Nobuo Sato
University of Connecticut/JLab

*The Quest to Unveil Partonic Degrees of Freedom in Hadrons Using High 
Energy Reactions *

Over the last thirty years, significant progress has been made in 
characterizing the longitudinal momentum distribution
of quarks and gluons inside hadrons known as Parton distribution 
functions (PDFs). These play a key role at facilities
such as the LHC in connection with the discovery of the Higgs boson, as 
well as constraints on physics beyond the
standard model. Similarly, formation of hadrons from highly energetic 
final state quarks and gluons can be characterized
in terms of fragmentation functions (FF), which encode the distribution 
of longitudinal momentum fractions that hadrons
carry from their parent quarks or gluons. At present, PDFs and FFs are 
not calculable from first principles but instead they
are extracted from experimental cross sections, and several groups are 
actively performing such analyses around the world.
The next step is to resolve the transverse momentum dependent 
distributions (TMD) for both PDFs and FFs which is one the
central tasks in the upcoming measurements at Jefferson Lab and the 
future Electron Ion Collider. In this talk, I will discuss
the challenges in an ongoing research program that involves theory and 
experimental efforts aimed towards the most
comprehensive analysis of nucleon structure ever undertaken.

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