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

Abstract

Here, proton recoil polarization was measured in the quasielastic 4He(e ,e'p ) 3H reaction at Q 2 = 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:
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 Org.:
Jefferson Lab E03-104 Collaboration
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
Resource 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)
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

Citation Formats

Michael Paolone, and Malace, Simona P. Polarization transfer in the 4He(e→,e'p→)3H reaction at Q2 = 0.8 and 1.3 (GeV/c)2. United States: N. p., 2010. Web. doi:10.1103/PhysRevLett.105.072001.
Michael Paolone, & Malace, Simona P. Polarization transfer in the 4He(e→,e'p→)3H reaction at Q2 = 0.8 and 1.3 (GeV/c)2. United States. doi:10.1103/PhysRevLett.105.072001.
Michael Paolone, and Malace, Simona P. Thu . "Polarization transfer in the 4He(e→,e'p→)3H reaction at Q2 = 0.8 and 1.3 (GeV/c)2". United States. doi:10.1103/PhysRevLett.105.072001. https://www.osti.gov/servlets/purl/985221.
@article{osti_985221,
title = {Polarization transfer in the 4He(e→,e'p→)3H reaction at Q2 = 0.8 and 1.3 (GeV/c)2},
author = {Michael Paolone and Malace, Simona P.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.105.072001},
journal = {Physical Review Letters},
number = 7,
volume = 105,
place = {United States},
year = {2010},
month = {8}
}

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