Study of the Quasielastic 3He(e,e'p) Reaction at Q2=1.5 (GeV/c)2 up to Missing Momenta of 1 GeV/c
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
As a part of the E89044 experiment at Hall A of Jefferson Lab, we have studied the quasielastic 3He(e,e'p) reaction in perpendicular coplanar kinematics, with energy and momentum transfer by the electron fixed at 837 MeV and 1500 MeV/c respectively, at three beam energies of 1255, 1954 and 4807 MeV. 2He(e,e'p)D and 2He(e,e'p)pn cross sections and distorted spectral functions were measured up to missing momenta of 1000 MeV/c, and, for the three-body breakup channel, up to missing energy of 30 MeV. The ATL asymmetry, RT and RTL response functions, and the combination RL+ RTTVTT/VL of response functions were separated for the 2He(e,e'p)D reaction channel up to missing momenta of 550 MeV/c. In the low missing momentum regime, measured 3He(e,e'p)D cross sections agree with available calculations based on variational ground state wave functions, and disagree with calculations based on Faddeev-type ground state wave functions. For missing momenta from 100 to 740 MeV/c, strong final state interaction effects, in general consistent with Glauber-type and diagrammatic calculations, are observed. On a finer detail, meson exchange currents, isobaric currents and dynamical relativistic effects might be isolated with further theoretical work, in view of remaining disagreements between available calculations and the measurements. For missing momenta from 740 to 1000 MeV/c, measured 2He(e,e'p)D cross sections are more than an order of magnitude greater than predicted by available theories. Further theoretical work is needed for understanding the nature of processes in this region.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 824894
- Report Number(s):
- JLAB-PHY-03-167; DOE/ER/40150-2745; TRN: US0402156
- Resource Relation:
- Other Information: TH: Thesis (Ph.D.); Submitted to Massachusetts Inst. of Tech., Cambridge, MA (US); PBD: 1 Sep 2003
- Country of Publication:
- United States
- Language:
- English
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