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

Malace, Simona P.

doi:10.1103/PhysRevLett.105.072001

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

Journal Article · Thu Aug 12 00:00:00 UTC 2010 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.105.072001 · OSTI ID:985221

Malace, Simona P. ^[1]

Univ. of South Carolina, Columbia, SC (United States). et al.

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.

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Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Contributing Organization:: Jefferson Lab E03-104 Collaboration

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 985221

Report Number(s):: DOE/OR/23177--3685; JLAB-PHY--10-1127

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 105; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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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

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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