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Theory Center Seminar<br>
Wed., Jan. 5, 2011<br>
CEBAF Center, Room L104<br>
10:00 a.m.<br>
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<b>QCD Structure of Hard Processes in Nuclear Interactions</b>
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<div>Carlos Granados<br>
Florida International University<br>
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<div>Hard photodisintegration of a nucleon nucleon system (NN) is
studied within the framework of the hard rescattering model (HRM).
Hard NN breakup is described through the HRM by explicitly
invoking QCD degrees of freedom; the incoming photon is absorbed
by one nucleon’s valence quark that then undergoes a hard
rescattering reaction with a valence quark from the second nucleon
producing two nucleons emerging at large transverse momentum.
Parameter free cross sections for pp and pn break up channels are
then calculated through the input of experimental cross sections
on pp and pn elastic scattering. The computed cross section for pp
breakup (particularly its predicted energy dependency) is in good
agreement with recent experimental data. Predictions on spectator
momentum distributions and helicity transfer are also presented.
Motivation for the study of Delta-Isobar production in hard
photodisintegration of the deuteron and further applications are
also discussed. </div>
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