Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-05-23
Phys.Lett.B578:69-77,2004
Physics
Nuclear Physics
Nuclear Theory
15 pages, 4 eps figures
Scientific paper
10.1016/j.physletb.2003.10.018
Hard photodisintegration of the deuteron has been extensively studied in order to understand the dynamics of the transition from hadronic to quark-gluon descriptions of the strong interaction. In this work, we discuss the extension of this program to hard photodisintegration of a $pp$ pair in the $^3$He nucleus. Experimental confirmation of new features predicted here for the suggested reaction would advance our understanding of hard nuclear reactions. A main prediction, in contrast with low-energy observations, is that the $pp$ breakup cross section is not much smaller than the one for $pn$ break up.In some models, the energy-dependent oscillations observed for $pp$ scattering are predicted to appear in the $\gamma ^3{\rm He} \to p p + n$ reaction. Such an observation would open up a completely new field in studies of color coherence phenomena in hard nuclear reactions. We also demonstrate that, in addition to the energy dependence, the measurement of the light-cone momentum distribution of the recoil neutron provides an independent test of the underlying dynamics of hard disintegration.
Brodsky Stanley J.
Frankfurt Leonid L.
Gilman Robert
Hiller John R.
Miller Gary A.
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