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Theory Center Seminar<br>
Friday, Feb. 17, 2017<br>
CEBAF Center, Room F113<br>
2:00-3:00 p.m. (coffee at 1:45 p.m.)<br>
<br>
Daniel Pitonyak<br>
Penn State University Berks<br>
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<div class=""><b>Understanding the Structure of Hadrons Through Spin
Observables<br>
in Hard-Scattering Processes</b></div>
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<div class="">Almost all of the visible matter in the universe is
built from hadrons which are composed<br>
of quarks and gluons. One of the main challenges in nuclear
physics is to understand this <br>
complex internal structure. In this talk, I will discuss how
high-energy collisions that involve <br>
the spin of hadrons give us insight into aspects of their
inner-workings that otherwise would<br>
be inaccessible. Within the context of the JLab12 program and
future Electron-Ion Collider, <br>
I will focus on phenomena that arise when hadrons carry spin
transverse to their direction <br>
of motion, which allow us to examine them in 3D and analyze
correlations between their quarks<br>
and gluons. I will also discuss a new way the so-called “spin
crisis” of how the proton gets its <br>
spin might get resolved and its implication for future fits of
helicity PDFs.</div>
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