Measurement of double-polarization asymmetries in the quasi-elastic He→3(e→,e′p) process

Autor: M. Mihovilovič, G. Jin, E. Long, Y.-W. Zhang, K. Allada, B. Anderson, J.R.M. Annand, T. Averett, W. Bertozzi, W. Boeglin, P. Bradshaw, A. Camsonne, M. Canan, G.D. Cates, C. Chen, J.P. Chen, E. Chudakov, R. De Leo, X. Deng, A. Deltuva, A. Deur, C. Dutta, L. El Fassi, D. Flay, S. Frullani, F. Garibaldi, H. Gao, S. Gilad, R. Gilman, O. Glamazdin, J. Golak, S. Golge, J. Gomez, O. Hansen, D.W. Higinbotham, T. Holmstrom, J. Huang, H. Ibrahim, C.W. de Jager, E. Jensen, X. Jiang, M. Jones, H. Kamada, H. Kang, J. Katich, H.P. Khanal, A. Kievsky, P. King, W. Korsch, J. LeRose, R. Lindgren, H.-J. Lu, W. Luo, L.E. Marcucci, P. Markowitz, M. Meziane, R. Michaels, B. Moffit, P. Monaghan, N. Muangma, S. Nanda, B.E. Norum, K. Pan, D.S. Parno, E. Piasetzky, M. Posik, V. Punjabi, A.J.R. Puckett, X. Qian, Y. Qiang, X. Qui, S. Riordan, A. Saha, P.U. Sauer, B. Sawatzky, R. Schiavilla, B. Schoenrock, M. Shabestari, A. Shahinyan, S. Širca, R. Skibiński, J. St. John, R. Subedi, V. Sulkosky, W. Tireman, W.A. Tobias, K. Topolnicki, G.M. Urciuoli, M. Viviani, D. Wang, K. Wang, Y. Wang, J. Watson, B. Wojtsekhowski, H. Witała, Z. Ye, X. Zhan, Y. Zhang, X. Zheng, B. Zhao, L. Zhu
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Physics Letters B, Vol 788, Iss , Pp 117-121 (2019)
Druh dokumentu: article
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2018.10.063
Popis: 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. Keywords: Double-polarization asymmetry, Helium-3 nucleus, Proton knock-out
Databáze: Directory of Open Access Journals
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