新发现的$Ξ_c^{0}$共振及其参数
Newly discovered $Ξ_c^{0}$ resonances and their parameters
摘要：
本文的目的是研究新观测到的粲奇异重子的共振态$Ξ_c(2923)^{0}$、$Ξ_c(2939)^{0}$和$Ξ_c(2965)^{0}$。为此，我们分别计算了基态和激发态$1P$和$2S$自旋- $% 1/2 $味六重态重子$Ξ_{c}^{\prime 0}$、$Ξ_{c}^{\prime 0}(1/2^{-})$和含夸克含量$csd$的$Ξ_{c}^{\prime 0}(1/2^{+})$的质量和极剩余。同时还计算了基态和激发态自旋- $3/2$重子$Ξ_{c}^{\star 0}$的质量和极余。用QCD两点求和规则方法计算了这些粒子的光谱参数。激发重子的宽度是通过它们衰变到末态$Λ_{c}^{+}K^{-}$和$% Ξ_{c}^{\prime 0}π$来计算的。这些过程是探索通过完整的QCD光锥求和规则的方法来确定强耦合在相关顶点。得到的预测的质量和宽度的四个激发重子，以及以前的结果$1P$和$2S$味反三重态自旋1/2粒子$Ξ_c^{0}$面临的$Ξ_{c}^{0}$共振的可用实验数据，以固定其量子数。我们的比较表明，共振$Ξ_c(2923)^{0}$和$Ξ_c(2939)^{0}$可以分别被认为是自旋- $1/2$味六重态和自旋- $3/2$重子的$1P$激发。共振$Ξ_{c}(2965)^{0}$可以解释为自旋$% 1/2$味六重态或反三重态重子的激发态。
英文摘要：
The aim of the present article is investigation of the newly observed resonances $Ξ_c(2923)^{0}$, $Ξ_c(2939)^{0}$, and $Ξ_c(2965)^{0}$ which are real candidates to charm-strange baryons. To this end, we calculate the mass and pole residue of the ground-state and excited $1P$ and $2S$ spin-$% 1/2 $ flavor-sextet baryons $Ξ_{c}^{\prime 0}$, $Ξ_{c}^{\prime 0}(1/2^{-})$ and $Ξ_{c}^{\prime 0}(1/2^{+})$ with quark content $csd$, respectively. The masses and pole residues of the ground-state and excited spin-$3/2$ baryons $Ξ_{c}^{\star 0}$ are found as well. Spectroscopic parameters of these particles are computed in the context of the QCD two-point sum rule method. Widths of the excited baryons are evaluated through their decays to final states $Λ_{c}^{+}K^{-}$ and $% Ξ_{c}^{\prime 0}π$. These processes are explored by means of the full QCD light-cone sum rule method necessary to determine strong couplings at relevant vertices. Obtained predictions for the masses and widths of the four excited baryons, as well as previous results for $1P$ and $2S$ flavor-antitriplet spin-1/2 particles $Ξ_c^{0}$ are confronted with available experimental data on $Ξ_{c}^{0}$ resonances to fix their quantum numbers. Our comparison demonstrates that the resonances $Ξ_c(2923)^{0}$ and $Ξ_c(2939)^{0}$ can be considered as $1P$ excitations of the spin-$1/2$ flavor-sextet and spin-$3/2$ baryons, respectively. The resonance $Ξ_{c}(2965)^{0}$ may be interpreted as the excited $2S$ state of either spin-$% 1/2$ flavor-sextet or antitriplet baryon.
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。
