Measurement of Double-Polarization Asymmetries in the Quasi-Elastic He→3(E→,E′P) Process
Double-polarization asymmetry, Helium-3 nucleus, Proton knock-out
© 2018 The Author 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, Y. W.; Allada, K.; Anderson, B.; Annand, J. R.M.; Averett, T.; Bertozzi, W.; Boeglin, W.; Bradshaw, P.; Camsonne, A.; Canan, M.; Cates, G. D.; Chen, C.; Chen, J. P.; 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.; and King, P., "Measurement of Double-Polarization Asymmetries in the Quasi-Elastic He→3(E→,E′P) Process" (2019). Physics & Astronomy Open Access Publications. 149.