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arXiv 0909.1385nucl-th
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$Ξ$ -在$Ξ^-$产生阈值区域的核电位和$(K^-,K^+)$包含谱

$Ξ$-nucleus potential and $(K^-,K^+)$ inclusive spectrum at $Ξ^-$ production threshold region

Michio Kohno, Shintaro Hashimoto

摘要:

鉴于SU $_6$夸克模型重子-重子相互作用微观计算预测的非常弱的$Ξ$ -核势,重新研究了$(K^-,K^+)$ $Ξ^-$产生包含谱。用半经典扭曲波(SCDW)方法计算了包含谱。强度函数与格林函数方法的显式比较表明了SCDW近似的定量可靠性。据推测,在$Ξ$产生阈值区域的现有数据并不一定意味着在传统的Woods-Saxon形式中,$Ξ$ -核势的吸引强度为约15 MeV。相反,几乎为零的电势是优选的。

英文摘要:

The $(K^-,K^+)$ $Ξ^-$ production inclusive spectrum is reinvestigated in view of the very weak $Ξ$-nucleus potential predicted by microscopic calculations with the SU$_6$ quark-model baryon-baryon interaction. The inclusive spectrum is evaluated by the semiclassical distorted wave (SCDW) method. The explicit comparison of the strength function with that of the Green-function method demonstrates the quantitative reliability of the SCDW approximation. It is presumed that the presently available data at the $Ξ$ production threshold region does not necessarily imply the attractive strength of about 15 MeV for the $Ξ$-nucleus potential in a conventional Woods-Saxon form. Instead, an almost zero potential is preferable.

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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