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Hyde, C. Ferdi, C. Gu, C. J. Horowitz, C. M. Jen, C. M. Sutera, C. Munoz-Camacho, D. Deepa, D. Dutta, D. Flay, D. G. Meekins, D. J. Margaziotis, D. Lambert, D. Lhuillier, D. McNulty, D. Neyret, D. Parno, D. S. Armstrong, D. Wang, D. W. Higinbotham, E. Burtin, E. Chudakov, E. Cisbani, E. Fuchey, E. Gasser, E. Jensen, E. Kuchina, E. Voutier, F. Benmokhtar, F. Butaru, F. Cusanno, F. Garibaldi, F. Itard, F. Mammoliti, G. B. Franklin, G. D. Cates, G. Jin, G. M. Urciuoli, G. Ron, G. Russo, H. Albataineh, H. Benaoum, H. Ibrahim, H. Yao, J. Arrington, J. Barber, J. Benesch, J. Cahoon, J. Gomez, J. Grames, J. Hansknecht, J. H. Lee, J. Hoskins, J. Huang, J. J. Lerose, J. Katich, J. Leacock, J. Leckey IV, J. Mammei, J. M. Finn, J. P. Chen, J. Roche, J. Singh, J. Wexler, J. Zhang, K. Aniol, K. de Jager, K. D. Paschke, K. Fuoti, K. Grimm, K. Kliakhandler, K. McCormick, K. Otis, K. Prok, K. Saenboonruang, K. S. Kumar, K. Slifer, K. Wang, L. E. Glesener, L. J. Kaufman, L. Lagamba, L. Mercado, L. Zana, M. Canan, M. Friend, M. Gorchtein, M. L. Sperduto, M. L. Stutzman, M. Mazouz, M. M. Dalton, M. Mihovilovic, M. Poelker, M. Posik, M. Potokar, N. Liyanage, N. Lubinsky, N. Muangma, Nuruzzaman, O. Hansen, O. Hen, P. A. Souder, P. Bertin, P. Bosted, P. Carter, P. Decowski, P. E. Reimer, P. LaViolette, P. Markowitz, P. M. King, P. Monaghan, PREX Collaborations: S. Abrahamyan, P. Rogan, P. Solvignon, P. Ulmer, P. Zhu, R. Beminiwattha, R. De Leo, R. Gilman, R. J. Feuerbach, R. Lindgren, R. Pomatsalyuk, R. S. Holmes, R. Silwal, R. Snyder, R. Subedi, R. Suleiman, R. Wilson, R. W. Michaels, S. A. Fuchs, Seonho Choi, S. Frullani, S. Johnston, S. Kowalski, S. K. Phillips, S. L. Bailey, S. Nanda, S. Riordan, S. Sirca, T. Averett, T. B. Humensky, T. Bielarski, The HAPPEX, T. Holmstrom, V. Bellini, V. Nelyubin, V. Sulkosky, V. Yim, V. Ziskin, W. Armstrong, W. A. Tobias, W. Boeglin, W. Deconinck, W. Troth, X. Deng, X. Jiang, X. Qian, X. Yan, X. Zhan, X. Zheng, Y. C. Chao, Y. Oh, Y. Qiang, Y. Ye, Y. Zhang, Z. Ahmed, Z. E. Meziani, Z. Ye","submitted_at":"2012-08-30T13:17:59Z","abstract_excerpt":"We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the $^{208}$Pb result is significantly smaller than the corresponding prediction using the same formalism. 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