Polarization transfer in the He4(e→,e p→)H3 Reaction at Q2=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. GlisterD. 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. Subedi, L. Tang, D. Tedeschi, V. Tvaskis, J. M. Udias, P. E. Ulmer, J. R. Vignote, F. R. Wesselmann, B. Wojtsekhowski, X. Zhan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Proton recoil polarization was measured in the quasielastic He 4(e→,ep→)H3 reaction at Q2=0.8 and 1.3(GeV/c)2 with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the H1(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.

Original languageEnglish
Article number072001
JournalPhysical Review Letters
Volume105
Issue number7
DOIs
StatePublished - 12 Aug 2010

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