In-medium Σ⁰–Λ mixing in QCD sum rules

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• 作者：Yagisawa ; N. ; Hatsuda ; T. ; Hayashigaki ; A.
• 关键词：11.55.Fv ; 11.55.Hx ; 12.38.-t ; 14.20.-c ; 14.20.Jn ; 21.65.+f ; Baryon mixing ; Hyperons ; Isospin symmetry breaking ; Nuclear medium ; QCD sum rules
• 刊名：Nuclear Physics A
• 出版年：2002
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：March 11, 2002
• 卷：699
• 期：3-4
• 页码：665-689
• 文件大小：281 K

摘要

The Σ⁰–Λ mixing angle in isospin-asymmetric nuclear medium is investigated by using QCD sum rules. From the general consideration of the in-medium baryonic correlations, in-medium baryon mixings are shown to have several Lorentz structures such as the scalar mixing angle θ^S and the vector mixing angle θ^V. This causes a difference between the particle mixing θ (