Polarization transfer in the 4He(e-->,e'p-->)3H reaction up to Q2=2.6 (GeV/c)2

• Published in: Physical review letters Vol. 91; no. 5; p. 052301
• Main Authors: Strauch, S, Dieterich, S, Aniol, K A, Annand, J R M, Baker, O K, Bertozzi, W, Boswell, M, Brash, E J, Chai, Z, Chen, J-P, Christy, M E, Chudakov, E, Cochran, A, De Leo, R, Ent, R, Epstein, M B, Finn, J M, Fissum, K G, Forest, T A, Frullani, S, Garibaldi, F, Gasparian, A, Gayou, O, Gilad, S, Gilman, R, Glashausser, C, Gomez, J, Gorbenko, V, Gueye, P L J, Hansen, J O, Higinbotham, D W, Hu, B, Hyde-Wright, C E, Ireland, D G, Jackson, C, de Jager, C W, Jiang, X, Jones, C, Jones, M K, Kellie, J D, Kelly, J J, Keppel, C E, Kumbartzki, G, Kuss, M, LeRose, J J, Livingston, K, Liyanage, N, Malov, S, Margaziotis, D J, Meekins, D, Michaels, R, Mitchell, J H, Nanda, S K, Nappa, J, Perdrisat, C F, Punjabi, V A, Ransome, R D, Roché, R, Rosner, G, Rvachev, M, Sabatie, F, Saha, A, Sarty, A, Udias, J M, Ulmer, P E, Urciuoli, G M, van den Brand, J F J, Vignote, J R, Watts, D P, Weinstein, L B, Wijesooriya, K, Wojtsekhowski, B
• Format: Journal Article
• Language: English
• Published: United States 01.08.2003
• ISSN: 0031-9007; 1079-7114

We have measured the proton recoil polarization in the 4He(e-->,e(')p-->)4H reaction at Q(2)=0.5, 1.0, 1.6, and 2.6 (GeV/c)(2). The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a medium modification of the proton form factors predicted by a quark-meson coupling model. In addition, the measured induced polarizations agree reasonably well with the fully relativistic calculation indicating that the treatment of final-state interactions is under control.