Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2

M. Paolone; S. P. Malace; S. Strauch; I. Albayrak; J. Arrington; B. L. Berman; E. J. Brash; B. Briscoe; A. Camsonne; J. -P. Chen; M. E. Christy; E. Chudakov; E. Cisbani; B. Craver; F. Cusanno; R. Ent; F. Garibaldi; R. Gilman; O. Glamazdin; J. Glister; D. W. Higinbotham; C. E. Hyde-Wright; Y. Ilieva; C. W. de Jager; X. Jiang; M. K. Jones; C. E. Keppel; E. Khrosinkova; E. Kuchina; G. Kumbartzki; B. Lee; R. Lindgren; D. J. Margaziotis; D. Meekins; R. Michaels; K. Park; L. Pentchev; C. F. Perdrisat; E. Piasetzky; V. A. Punjabi; A. J. R. Puckett; X. Qian; Y. Qiang; R. D. Ransome; A. Saha; A. J. Sarty; E. Schulte; P. Solvignon; R. R. Subudi; L. Tang; D. Tedeschi; V. Tvaskis; J. M. Udias; P. E. Ulmer; J. R. Vignote; F. R. Wesselmann; B. Wojteskhowski; X. Zhan

doi:10.1103/physrevlett.105.072001

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arXiv · 1002.2188

Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2

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Abstract

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.

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M. Paolone, S. P. Malace, S. Strauch, I. Albayrak, J. Arrington, B. L. Berman, E. J. Brash, B. Briscoe, A. Camsonne, J. -P. Chen, M. E. Christy, E. Chudakov, E. Cisbani, B. Craver, F. Cusanno, R. Ent, F. Garibaldi, R. Gilman, O. Glamazdin, J. Glister, D. W. Higinbotham, C. E. Hyde-Wright, Y. Ilieva, C. W. de Jager, X. Jiang, M. K. Jones, C. E. Keppel, E. Khrosinkova, E. Kuchina, G. Kumbartzki, B. Lee, R. Lindgren, D. J. Margaziotis, D. Meekins, R. Michaels, K. Park, L. Pentchev, C. F. Perdrisat, E. Piasetzky, V. A. Punjabi, A. J. R. Puckett, X. Qian, Y. Qiang, R. D. Ransome, A. Saha, A. J. Sarty, E. Schulte, P. Solvignon, R. R. Subudi, L. Tang, D. Tedeschi, V. Tvaskis, J. M. Udias, P. E. Ulmer, J. R. Vignote, F. R. Wesselmann, B. Wojteskhowski, X. Zhan. 2010-08-23. Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2. https://doi.org/10.1103/physrevlett.105.072001

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