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New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei

2012; American Physical Society; Volume: 109; Issue: 19 Linguagem: Inglês

10.1103/physrevlett.109.192501

1092-0145

Sergey Abrahamyan, A. Acha, Andrei Afanasev, Z. Ahmed, H. Al-Bataineh, K. Aniol, David Armstrong, W. Armstrong, J. Arrington, T. Averett, B. Babineau, Stephanie Bailey, J. Barber, R. Barbieri, A. Beck, Vincenzo Bellini, R. Beminiwattha, H. Benaoum, J. Benesch, F. Benmokhtar, P.Y. Bertin, T. Bielarski, W. Boeglin, P. Bosted, F. Butaru, E. Burtin, J.L. Cahoon, A. Camsonne, M. Canan, P. Carter, C. C. Chang, G. D. Cates, Yu-Chiu Chao, C. Chen, J.-P. Chen, Seonho Choi, E. Chudakov, E. Cisbani, B. Craver, F. Cusanno, M. M. Dalton, R. De Leo, Kees de Jager, W. Deconinck, P. Decowski, D. Deepa, X. Deng, A. Deur, D. Dutta, A. Étilé, C. Ferdi, R. J. Feuerbach, J. M. Finn, D. Flay, G. Franklin, M. Friend, S. Frullani, E. Fuchey, Sabine Fuchs, K. Fuoti, F. Garibaldi, E. Gasser, R. Gilman, A. Giusa, A. Glamazdin, Lindsay Glesener, J. Gómez, Mikhail Gorchtein, Joseph Grames, K. Grimm, C. Gu, O. Hansen, J. Hansknecht, O. Hen, D. W. Higinbotham, R. Holmes, T. Holmstrom, C. J. Horowitz, J. R. Hoskins, J. Huang, T. B. Humensky, C. E. Hyde-Wright, H. Ibrahim, F. Itard, C.-M. Jen, Eric Jensen, X. Jiang, G. Jin, S. Johnston, Joseph M. Katich, L. J. Kaufman, A. Kelleher, K. Kliakhandler, P. M. King, A. Kolarkar, S. Kowalski, C. C. Kuo, K.S. Kumar, L. Lagamba, D. Lambert, Paul A. LaViolette, J. Leacock, J. Leckey, Jeong Han Lee, J. J. LeRose, D. Lhuillier, R. Lindgren, N. Liyanage, N. Lubinsky, J. Mammei, F. Mammoliti, D. J. Margaziotis, P. Markowitz, M. Mazouz, K. McCormick, Amber McCreary, D. McNulty, D. Meekins, L. Mercado, Z.-E. Meziani, R. Michaels, M. Mihovilovič, B. Moffit, Peter Monaghan, N. Muangma, C. Muñoz-Camacho, S. Nanda, V. Nelyubin, D. Neyret, Nuruzzaman, Yongseok Oh, K. Otis, Andrew Palmer, D. S. Parno, K. Paschke, S. K. Phillips, Matt Poelker, R. Pomatsalyuk, M. Posik, M. Potokar, K. Prok, A. J. R. Puckett, X. Qian, Y. Qiang, B. Quinn, A. Rakhman, P. E. Reimer, B. Reitz, S. Riordan, J. Roche, P. Rogan, G. Ron, G.V. Russo, Kiadtisak Saenboonruang, A. Saha, B. Sawatzky, A. Shahinyan, R. Silwal, Jaideep Singh, S. Širca, K. Slifer, R. Snyder, P. Solvignon, P. A. Souder, M. L. Sperduto, R. Subedi, Marcy Stutzman, R. Suleiman, V. Sulkosky, C. Sutera, W. A. Tobias, W. Troth, G. M. Urciuoli, P. E. Ulmer, A. Vacheret, E. Voutier, B. Waidyawansa, D. Wang, K. Wang, J. Wexler, A. Whitbeck, R. J. Wilson, B. Wojtsekhowski, X. Yan, H. Yao, Y. Ye, Z. Ye, V. Yim, L. Zana, X. Zhan, J. Zhang, Y. Zhang, Xiaochao Zheng, V. Ziskin, Peng Zhu,

Nuclear physics research studies

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. These results suggest that a systematic set of new $A_n$ measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.