Phys. Rev. C 60, 064622 (1999) [21 pages]Out-of-plane measurements of the fifth response function of the exclusive electronuclear response |
Received 16 December 1998; published 22 November 1999
The first measurements of fLT′, known as the fifth response function, have been made for the 2H(e→,e′p) and 12C(e→,e′p) reactions. This response is directly related to the imaginary part of the interference between the transverse and longitudinal nuclear electromagnetic currents. Its observation requires longitudinally polarized electron beams and out-of-plane detection, the latter made possible by the newly developed out-of-plane spectrometer system. The initial measurements were made by using a 560-MeV polarized electron beam and quasielastic kinematics at Q2=3.3 fm-2. The development of the methodology for out-of-plane physics, and the analysis of the data from the initial experiments are described in detail. The measured fifth response and the related asymmetry in the coincidence cross section are in agreement, albeit with large statistical errors, with the theoretical predictions. Future extensions of the out-of-plane program are also discussed.
©1999 The American Physical Society
URL: http://link.aps.org/abstract/PRC/v60/e064622
DOI: 10.1103/PhysRevC.60.064622
PACS: 25.30.Fj, 24.70.+s, 27.10.+h, 27.20.+n
* Present address: Raytheon Missile Systems, Loc. TU, Bldg. 801, M/S H15, 1151 E. Hermans Rd., Tucson, AZ 85734-1137.
† Present address: Institut für Kernphysik der Universität Mainz, D-55099 Mainz, Germany.
‡ Present address: University of Kentucky, Lexington, KY 40506.
§ Present address: Schillerstr. 26, 78576 Emmingen, Germany.
** Present address: TRIUMF, 4004 Westbrook Mall, Vancouver BC, Canada V6T 2A3.
†† Present address: Kyungpook National University, Taegu 702-701, S. Korea.
‡‡ Present address: Massachusetts General Hospital, Nuclear Magnetic Resonance Center, Charlestown, MA 02129.
¶ Present address: Old Dominion University, Norfolk, VA 23529.
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