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arXiv 1108.3017hep-phhep-exhep-latnucl-exnucl-th
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高Q2下的N*(1535)电生成

N*(1535) electroproduction at high Q2

G. Ramalho, M. T. Pena, K. Tsushima

摘要:

利用协变旁观者夸克模型研究了大Q2区的γ N -> N ~*(1535)反应.从核子与N ~*(1535)系统的关系出发,在不增加任何参数的情况下,确定了N ~*(1535)价夸克波函数。该模型然后用于计算伽马N -> N*(1535)转变形状因子。当Q2 > GeV^2时,A12和S12螺旋度振幅之间的一个非常有趣而有用的关系也被推导出来。

英文摘要:

A covariant spectator quark model is applied to study the gamma N -> N*(1535) reaction in the large Q2 region. Starting from the relation between the nucleon and N*(1535) systems, the N*(1535) valence quark wave function is determined without the addition of any parameters. The model is then used to calculate the gamma N -> N*(1535) transition form factors. A very interesting, useful relation between the A12 and S12 helicity amplitudes for Q2 > GeV^2, is also derived.

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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