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arXiv 1109.5545hep-ph
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强子衰变到重子-反重子末态的理论

Theory of hadron decay into baryon-antibaryon final state

Yu. A. Simonov

摘要:

考虑了强子内部产生双夸克对$(q\bar q)$($q\bar q)$)的重子-反重子产生的非微扰机制,计算了强子初末波函数之间顶点算符的矩阵元振幅.顶点算符仅用第一原理输入表示:当前夸克质量、弦张力$σ$和$α_s$。与单对产生介子-介子不同,在重子情况下,在顶点出现了一个新的实体:真空关联长度$λ$,它是以前通过弦张力$σ$计算的。作为一个应用程序的$Λ_c \barΛ_c$的电生产进行了计算和增强附近4.61 GeV的发现与最近的实验数据一致。

英文摘要:

The nonperturbative mechanism of baryon-antibaryon production due to double quark pair $(q\bar q)$($q\bar q)$ generation inside a hadron is considered and the amplitude is calculated as matrix element of the vertex operator between initial and final hadron wave functions. The vertex operator is expressed solely in terms of first principle input: current quark masses, string tension $σ$ and $α_s$. In contrast to meson-meson production via single pair generation, in baryon case a new entity appears in the vertex: the vacuum correlation length $λ$, which was computed before through string tension $σ$. As an application electroproduction of $Λ_c \barΛ_c$ was calculated and an enhancement near 4.61 GeV was found in agreement with recent experimental data.

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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