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Measurement of double-polarization asymmetries in the quasi-elastic He→3(e→,e<sup>′</sup>p) process
Mihovilovič, M Jin, G Long, E Zhang, YW Allada, K Anderson, B Annand, JRM Averett, T Bertozzi, W Boeglin, W
Mihovilovič, M
Jin, G
Long, E
Zhang, YW
Allada, K
Anderson, B
Annand, JRM
Averett, T
Bertozzi, W
Boeglin, W
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Journal Article
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2019-01-10
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10.1016/j.physletb.2018.10.063
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© 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.
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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
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