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Title: Polarization transfer in the 4He(e,e'p)3H reaction at Q2 = 0.8 and 1.3 (GeV/c)2

Here, proton recoil polarization was measured in the quasielastic 4He(e,e'p)3H reaction at Q2 = 0.8 (GeV/c)2 and 1.3 (GeV/c)2 with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the 1H(e,e'p) reaction, contradicting a relativistic distorted-wave approximation, and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton.
Authors:
;  [1]
  1. Univ. of South Carolina, Columbia, SC (United States). et al.
Publication Date:
OSTI Identifier:
985221
Report Number(s):
JLAB-PHY--10-1127; DOE/OR/23177--3685
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1006095
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 7; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Orgs:
Jefferson Lab E03-104 Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; CHARGE EXCHANGE; FINAL-STATE INTERACTIONS; FORM FACTORS; POLARIZATION; PROTONS