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arXiv 2105.09079nucl-thhep-ph
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准弹性电子与$^{12}$ C散射的介子交换流和超标度分析

Meson-exchange currents and superscaling analysis with relativistic effective mass of quasielastic electron scattering from $^{12}$C

V. L. Martinez-Consentino, I. Ruiz Simo, J. E. Amaro

摘要:

通过从数据中减去两粒子发射的影响,我们重新分析了包含准弹性电子从$^{12}$ C散射的标度性质。在核物质的平均场论中采用了相对论性介子交换流模型,其中标量势和矢量势诱导了核子的有效质量和矢量能。一个新的唯象准弹性标度函数提取后的2 p-2 h的贡献减去选择的数据。由此产生的相对论有效质量的超标度方法(SuSAM*)可以用来计算真正的准弹性截面没有污染的2 p-2 h通道,然后可以单独添加,以获得总的准弹性加两个核子的发射响应。

英文摘要:

We reanalyze the scaling properties of inclusive quasielastic electron scattering from $^{12}$C by subtracting from the data the effects of two-particle emission. A model of relativistic meson-exchange currents (MEC) is employed within the mean field theory of nuclear matter, with scalar and vector potentials that induce an effective mass and a vector energy to the nucleons. A new phenomenological quasielastic scaling function is extracted from a selection of the data after the subtraction of the 2p-2h contribution. The resulting superscaling approach with relativistic effective mass (SuSAM*) can be used to compute the genuine quasielastic cross section without contamination of the 2p-2h channel that can then be added separately to obtain the total quasielastic plus two-nucleon emission response.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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