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, Ronald 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, Ronald 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

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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 (US)
Article number072001
JournalPhysical review letters
Volume105
Issue number7
DOIs
StatePublished - Aug 12 2010

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Paolone, M., Malace, S. P., Strauch, S., Albayrak, I., Arrington, J., Berman, B. L., Brash, E. J., Briscoe, B., Camsonne, A., Chen, J. P., Christy, M. E., Chudakov, E., Cisbani, E., Craver, B., Cusanno, F., Ent, R., Garibaldi, F., Gilman, R., Glamazdin, O., ... Zhan, X. (2010). Polarization transfer in the He4(e→,e p→)H3 Reaction at Q2=0.8 and 1.3(GeV/c) 2. Physical review letters, 105(7), [072001]. https://doi.org/10.1103/PhysRevLett.105.072001