B→Kη′中双胶子聚合机制的进一步研究

来源 :高能物理与核物理 | 被引量 : 0次 | 上传用户：zjlzjl943

【摘要】

：

双胶子聚合机制可能解释B→Kη′反常大的分支比. 然而由于我们对η′ɡɡ有效顶点知之甚少,微扰QCD的理论计算存在很大的不确定性. 本文尝试了几种不同的η′ɡɡ形状因子,

【作者】

：

杜东生杨德山朱国怀

【机构】

：

中国科学院高能物理研究所

【出处】

：

高能物理与核物理

【发表日期】

：

2004年期

【关键词】

：

B介子衰变双胶子聚合机制微扰QCD B decay di-gluon fusion mechanism perturbative QCD

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双胶子聚合机制可能解释B→Kη′反常大的分支比. 然而由于我们对η′ɡɡ有效顶点知之甚少,微扰QCD的理论计算存在很大的不确定性. 本文尝试了几种不同的η′ɡɡ形状因子,并将数值结果和实验相比较. 我们发现,虽然我们对η′ɡɡ形状因子了解得很少,但是如果B→Kη′衰变中双胶子聚合机制确实很重要的话,B→Kη′的分支比将为10-5量级,这可以被将来的实验检验.

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B→Kη′中双胶子聚合机制的进一步研究

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