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

Measurement of double-polarization asymmetries in the quasi-elastic He→3(e→,e′p) process
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准弹性 He−3(e−,e−p) 过程中双极化不对称性的测量

DOI:
10.1016/j.physletb.2018.10.063
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发表时间:
2019
期刊:
影响因子:
4.4
通讯作者:
Boeglin, W.
Boeglin, W.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Mihovilovič, M.;Jin, G.;Long, E.;Zhang, Y.-W.;Allada, K.;Anderson, B.;Annand, J.R.M.;Averett, T.;Bertozzi, W.;Boeglin, W.

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我们报告的双极化不对称性的精确测量的电子诱导分裂的He 3进行到PD和ppn的最终状态,在准弹性运动学在Q2 = 0.25(GeV/c)2缺失的动量高达250 MeV/c。这些可观的高度敏感的工具,调查的电磁和自旋结构的He 3和相对重要性的两个和三体效应参与的分裂反应动力学。测量的不对称性不能令人满意地再现状态的最先进的计算He 3,除非他们的三体部分进行调整,表明自旋相关的部分,控制三体分裂过程的核相互作用比以前认为的要小得多。
We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of He 3 proceeding to pd and ppn final states, performed in quasi-elastic kinematics at Q 2= 0.25 (GeV/c) 2 for missing momenta up to 250 MeV/c. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of He 3 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 He 3 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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DOI: --
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期刊:
影响因子: --
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