FIZIKA B 13 (2004)  1, 201-208

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NEXT GENERATION OF PHOTODISINTEGRATION MEASUREMENTS AT
JEFFERSON LAB

E. PIASETZKYa, R. GILMANb,c and M. SARGSIANd

aSchool of Physics and Astronomy, Sackler Faculty of Exact Science,
Tel Aviv University, Tel Aviv 69978, Israel
bRutgers University, Piscataway, NJ 08854-8019 USA
cJefferson Lab, Newport News, VA 23606 USA
dFlorida International University, Miami, FL 33199 USA

Received 23 October 2003;      Accepted 31 May 2004
Online 10 October 2004

Several highly-rated experiments investigated high-energy, hard photodisintegration of the deuteron. We briefly review the results and the theoretical work devoted to understand them. We discuss here the extension of this program to hard photodisintegration of a pp pair in the 3He nucleus. A prediction is that the pp breakup cross section is not much smaller than the one for pn breakup, a clear indication to quark-gluon dynamics. In some models, the energy-dependent oscillations observed for pp scattering are predicted to appear in the g3Hepp+n reaction. We also claim that the measurement of the light-cone momentum distribution of the recoil neutron probes the underlying dynamics. The experiment is proposed for Hall A at Jefferson Lab (TJNAF) with beam energies of 2-5GeV.

PACS numbers: 25.10.+s, 25.20.-x, 24.85.+p, 13.75.Cs
UDC 539.12

Keywords: photodisintegration, hard process, scaling, energy oscillations, light cone momentum distribution

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