论文标题
单$λ_c^+$ $ hypernuclei在夸克平均模型中
Single $Λ_c^+$ hypernuclei within quark mean-field model
论文作者
论文摘要
夸克平均场（QMF）模型用于研究单个$λ^+_ c $ hypernuclei。 Charm Baryon，$λ^+_ C $，由三个组成夸克，$ u，〜d $和$ c $构建，并由中央谐波振荡器电位限制。魅力夸克的限制潜在强度是通过拟合符合魅力重子的实验质量，$λ^+_ c，〜σ^+_ c $和$ξ^{++} _ {cc} $来确定的。还考虑了在夸克水平上描述重子的作用。 $λ^+_ C $ HyperNuclei中的重子通过交换$σ，〜Ω $和$ρ$介子之间相互交互，而$ρ$ ersons之间的Quarks限制在不同的Baryons中。 QMF模型中的$λ^+_ c n $潜力很大程度上取决于$ω$ MESON和$λ^+_ c $，$ g_ {ωλ^+_ c} $之间的耦合常数。当使用常规的夸克计数规则时，i。 e。，$ g_ {ωλ^+_ c} = 2/3g_ {ωn} $，可以存在巨大的$λ^+_ c $ hypernucleus，其单个$λ^+_ c $ binding能量较小，由于质量强大的质量增加，由于$λ^+_ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ and cop and质量增加。当$ g_ {ωλ^+_ c} $由最新的晶格$λ^+_ c n $电势固定时，$λ^+_ c $ hypernuclei只能存在最多可达$ a \ sim 50 $。
The quark mean-field (QMF) model is applied to study the single $Λ^+_c$ hypernuclei. The charm baryon, $Λ^+_c$, is constructed by three constituent quarks, $u, ~d$, and $c$, confined by central harmonic oscillator potentials. The confinement potential strength of charm quark is determined by fitting the experimental masses of charm baryons, $Λ^+_c,~Σ^+_c$, and $Ξ^{++}_{cc}$. The effects of pions and gluons are also considered to describe the baryons at the quark level. The baryons in $Λ^+_c$ hypernuclei interact with each other through exchanging the $σ,~ω$, and $ρ$ mesons between the quarks confined in different baryons. The $Λ^+_c N$ potential in the QMF model is strongly dependent on the coupling constant between $ω$ meson and $Λ^+_c$, $g_{ωΛ^+_c}$. When the conventional quark counting rule is used, i. e., $g_{ωΛ^+_c}=2/3g_{ωN}$, the massive $Λ^+_c$ hypernucleus can exist, whose single $Λ^+_c$ binding energy is smaller with the mass number increasing due to the strong Coulomb repulsion between $Λ^+_c$ and protons. When $g_{ωΛ^+_c}$ is fixed by the latest lattice $Λ^+_c N$ potential, the $Λ^+_c$ hypernuclei only can exist up to $A\sim 50$.
