激发态Ξ_c^\prime和Ω_c重子的量子数以及P波Σ_c能谱
Quantum numbers of excited $Ξ_c^\prime$ and $Ω_c$ baryons and the $P$-wave $Σ_c$ spectrum
- Southeast University（东南大学）
- Henan Normal University（河南师范大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
研究利用HQET中的规则计算P波粲重子性质，通过分析质量分裂模式得出量子数赋值，预测了Σ_c态相关参数，并指出窄Ξ_c和Ω_c态光谱学可解析P波Σ_c能谱。
AI中文摘要：
近期对激发态重子的精确测量与系统理论研究相结合，使得解析其光谱精细结构成为可能。我们运用重夸克有效理论（HQET）中的QCD求和规则和光锥求和规则，计算了P波粲重子的质量和强衰变性质。尽管每个味区允许有七个态，但我们发现只有四个Σ_c、四个Ξ_c^\prime和五个Ω_c态有望在实验中分辨出来。通过分析相关粒子的质量分裂模式及理论结果，得出了一系列量子数赋值。我们还预测了四个可分辨的P波Σ_c态的质量、宽度和主要衰变模式。窄Ξ_c和Ω_c态的精确光谱学为解析P波Σ_c能谱提供了途径。
英文摘要：
Recent precision measurements of excited heavy baryons, combined with systematic theoretical studies, make it possible to resolve the fine structure of their spectra. We calculate the masses and strong-decay properties of the $P$-wave charmed baryons using QCD sum rules and light-cone sum rules within heavy quark effective theory (HQET). Although seven states are allowed in each flavor sector, we find that only four $Σ_c$, four $Ξ_c^\prime$, and five $Ω_c$ states are expected to be experimentally resolvable. The similar mass-splitting patterns of $Ξ_c(2882)$, $Ξ_c(2923)$, $Ξ_c(2939)$, and $Ξ_c(2965)$ and of $Ω_c(3000)$, $Ω_c(3050)$, $Ω_c(3066)$, and $Ω_c(3090)$, together with our theoretical results, lead to the successive quantum-number assignments $J^P=1/2^-,3/2^-,3/2^-$, and $5/2^-$. We tentatively interpret $Ω_c(3119)$ as a predominantly $ρ$-mode excitation with $J^P=3/2^-$. We also predict the masses, widths, and dominant decay modes of four resolvable $P$-wave $Σ_c$ states, which may overlap within the observed $Σ_c(2800)$ and $Σ_c(2900)$ structures. Precision spectroscopy of the narrow $Ξ_c$ and $Ω_c$ states thus provides a route to resolving the $P$-wave $Σ_c$ spectrum.
