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arXiv 2104.00439hep-ph
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轻奇异S=-1 $Λ$、$Σ$和S=-2 $Ξ$重子的光谱研究

Spectroscopic Investigation of Light Strange S=-1 $Λ$, $Σ$ and S=-2 $Ξ$ Baryons

Chandni Menapara, Ajay Kumar Rai

摘要:

本文研究了奇异度S=-1,同位旋I=0的轻奇异$Λ$,S=-1,I=1的$Σ$和S=-2,$I=\frac{1}{2}$的$Ξ$重子.本文采用线性约束势的超中心组分夸克模型,加上一阶修正项,得到了近4GeV的共振质量。计算的态包括1 S-5S、1 P-4P、1D-3D、1F-2F和1G(在少数情况下)以及所有可能的自旋宇称分配。分别探索了$(n,M^{2})$和$(J,M^{2})$计算质量的线性Regge轨迹。除了对基态自旋$\frac{1}{2}$和$\frac{3}{2}$的磁矩进行了深入的研究外,还对$Ξ$的第一负宇称态的组态混合进行了深入的研究。最后给出了跃迁磁矩和辐射衰减宽度。

英文摘要:

The present study is dedicated to light-strange $Λ$ with strangeness S=-1, isospin I=0; $Σ$ with S=-1, I=1 and $Ξ$ baryon with S=-2 and $I=\frac{1}{2}$. In this article, hypercentral Constituent Quark Model with linear confining potential has been employed along with first order correction term to obtain the resonance masses for nearly upto 4 GeV. The calculated states include 1S-5S, 1P-4P, 1D-3D, 1F-2F and 1G (in few case) along with all the possible spin-parity assignments. Regge Trajectories have been explored for the linearly of the calculated masses for $(n,M^{2})$ and $(J,M^{2})$ respectively. Magnetic moments have been intensively studied for ground state spin $\frac{1}{2}$ and $\frac{3}{2}$, in addition to the configuration mixing for first negative parity state for $Ξ$. Lastly, transition magnetic moment and radiative decay width have been presented.

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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