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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2003.02318nucl-thnucl-ex
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$^4$ He $(e,e'pN)$反应的广义接触形式分析

Generalized Contact Formalism Analysis of the $^4$He$(e,e'pN)$ Reaction

J. R. Pybus, I. Korover, R. Weiss, A. Schmidt, N. Barnea, D. W. Higinbotham, E. Piasetzky, M. Strikman, L. B. Weinstein, O. Hen

摘要:

在排他性$^4$ He $(e,e'pN)$反应的短程相关性的测量进行了分析,使用广义接触形式(GCF)。我们考虑了具有AV 18和局域N2 LO(1.0)核子-核子($NN$)势的瞬时形式和光锥形式。我们发现,运动学分布,如重建的对张开角,反冲中子动量分布,和对质心运动,以及测量的丢失能量,丢失质量分布,都很好地再现GCF计算。测量的$^4$ He $(e,e'pN)$/ $^4$ He $(e,e'p)$截面比对短距离$NN$相互作用的性质敏感,而缺少的动量依赖性也可以通过使用相互作用和公式的GCF计算很好地再现。这为短程多体核波函数的GCF尺度分离因式化描述提供了依据。

英文摘要:

Measurements of short-range correlations in exclusive $^4$He$(e,e'pN)$ reactions are analyzed using the Generalized Contact Formalism (GCF). We consider both instant-form and light-cone formulations with both the AV18 and local N2LO(1.0) nucleon-nucleon ($NN$) potentials. We find that kinematic distributions, such as the reconstructed pair opening angle, recoil neutron momentum distribution, and pair center of mass motion, as well as the measured missing energy, missing mass distributions, are all well reproduced by GCF calculations. The missing momentum dependence of the measured $^4$He$(e,e'pN)$ / $^4$He$(e,e'p)$ cross-section ratios, sensitive to nature of the $NN$ interaction at short-distacnes, are also well reproduced by GCF calculations using either interaction and formulation. This gives credence to the GCF scale-separated factorized description of the short-distance many-body nuclear wave-function.

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