Hard Photo-disintegration of proton pairs in 3He

Conference · Mon Oct 01 00:00:00 EDT 2007

OSTI ID:1967326

Gilman, Ronald ^[1]; Piasetzky, Eliazer ^[2]; Pomerantz, Ishay ^[2]

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1. Rutgers University, Camden, NJ (United States)
2. Tel Aviv University

Hard deuteron photo-disintegration has been investigated for 20 years, as its cross sections follow the constituent counting rules and it provides insight into the interplay between hadronic and quark-gluon degrees of freedom in high-momentum transfer exclusive reactions. We have now measured for the first time hard pp-pair disintegration in the reaction gamma 3He --> pp+n, using kinematics corresponding to a spectator neutron. Clues to the underlying physics can be found in the comparison of our measurements with deuteron photo-disintegration, the energy dependence of the cross sections at 90 deg. c.m., the alpha_n distribution, and the angular distribution.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1967326
• Report Number(s): JLAB-PHY-07-970; DOE/OR/23177-5924
• Resource Relation: Conference: 2007 Annual Meeting of the Division of Nuclear Physics, Newport News, Virginia, October 10–13, 2007
• Country of Publication: United States
• Language: English