Measurement of double-polarization asymmetries in the quasi-elastic He→3(e→,e′
We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of He3 proceeding to pd and ppn final states, performed in quasi-elastic kinematics at Q2=0.25(GeV/c)2 for missing momenta up to 250MeV/c. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of He3 and the relative importance of two- and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of He3 unless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought.
Mihovilovič, M; Jin, G; Long, E; Zhang, YW; Allada, K; Anderson, B; Annand, JRM; Averett, T; Bertozzi, W; Boeglin, W; Bradshaw, P; Camsonne, A; Canan, M; Cates, GD; Chen, C; Chen, JP; Chudakov, E; De Leo, R; Deng, X; Deltuva, A; Deur, A; Dutta, C; El Fassi, L; Flay, D; Frullani, S; Garibaldi, F; Gao, H; Gilad, S; Gilman, R; Glamazdin, O; Golak, J; Golge, S; Gomez, J; Hansen, O; Higinbotham, DW; Holmstrom, T; Huang, J; Ibrahim, H; de Jager, CW; Jensen, E; Jiang, X; Jones, M; Kamada, H; Kang, H; Katich, J; Khanal, HP; Kievsky, A; King, P; Korsch, W; LeRose, J; Lindgren, R; Lu, HJ; Luo, W; Marcucci, LE; Markowitz, P; Meziane, M; Michaels, R; Moffit, B; Monaghan, P; Muangma, N; Nanda, S; Norum, BE; Pan, K; Parno, DS; Piasetzky, E; Posik, M; Punjabi, V; Puckett, AJR; Qian, X; Qiang, Y; Qui, X; Riordan, S; Saha, A; Sauer, PU; Sawatzky, B; Schiavilla, R; Schoenrock, B; Shabestari, M; Shahinyan, A; Širca, S; Skibiński, R; St. John, J; Subedi, R; Sulkosky, V; Tireman, W; Tobias, WA; Topolnicki, K; Urciuoli, GM; Viviani, M; Wang, D; Wang, K; Wang, Y; Watson, J; Wojtsekhowski, B; Witała, H; Ye, Z; Zhan, X; Zhang, Y; Zheng, X; Zhao, B
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