FIZIKA B 13 (2004)  1, 201-208

NEXT GENERATION OF PHOTODISINTEGRATION MEASUREMENTS AT
JEFFERSON LAB

E. PIASETZKY^a, R. GILMAN^b,c and M. SARGSIAN^d

^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 g³He®pp+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

Copyright by The Croatian Physical Society
For problems or questions please contact fizika@fizika.hfd.hr