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60958 |
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|a Qian, X.
|e author
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|a Massachusetts Institute of Technology. Department of Materials Science and Engineering
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|a Massachusetts Institute of Technology. Department of Physics
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|a Qiang, Yi
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|a Zhan, X.
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|a Qiang, Yi
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|a Zhan, X.
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|a Polarization Transfer in the 4He(e⃗,e'p⃗)3H Reaction at Q2=0.8 and 1.3 (GeV/c)2
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|a Polarization Transfer in the [superscript 4]He(e⃗,e'p⃗)[superscript 3]H Reaction at Q[superscript 2]=0.8 and 1.3 (GeV/c)[superscript 2]
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|b American Physical Society,
|c 2011-02-16T17:24:57Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/60958
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|a Proton recoil polarization was measured in the quasielastic [superscript 4]He(e⃗,e'p⃗)[superscript 3]H reaction at Q [superscript 2]=0.8 and 1.3 (GeV/c)[superscript 2] with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the [superscript 1]H(e⃗,e'p⃗) 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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|a United States. Dept. of Energy
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|a National Science Foundation (U.S.)
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|a en_US
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|a Article
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|t Physical review letters
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