论文标题
在rhic Energies Au+au碰撞中的夸克组合模型中的奇怪强体产生
Strange hadron production in a quark combination model in Au+Au collisions at RHIC energies
论文作者
论文摘要
我们将夸克组合模型应用于研究中部au+au碰撞的奇怪（抗）hadrons的横向动量（$ p_ {t} $）光谱的产生密度和横向动量（$ p_ {t} $），该光谱在$ \ sqrt {s_ {nn}} = $ 77、11.5、11.5、11.5、19.6、27、27、27、27、39、39、39、39和200 GEV处。我们表明，在这些碰撞中的$ p_ {t} $光谱的实验数据可以通过在放射状态下的组成夸克和反quarks的相等速度组合系统地描述。我们在强扎时获得夸克和古夸克的$ p_ {t} $光谱，并研究了他们的碰撞能量依赖性。我们还重现了哈德子和抗哈德子的产量密度。特别是，我们证明了抗hadrons $ k^{ - }/k^{+} $，$ \ bar {p}/p $，$ \barλ$，$ \barλ$，$ \barξ^{+） $ \barΩ^{+}/ω^{ - } $ at $ \ sqrt {s_ {nn}} = $ 7.7 GEV由模型系统地描述。这些结果表明，在低RHIC能量下，在强化下的夸克和古夸克的相等速度组合机制在Au+Au碰撞中起重要作用（$ \ sqrt {s_ {s_ {nn}} \ geq $ 11.5 GEV）。
We apply a quark combination model to study yield densities and transverse momentum ($p_{T}$) spectra of strange (anti-)hadrons at mid-rapidity in central Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 19.6, 27, 39 and 200 GeV. We show that experimental data for $p_{T}$ spectra of (anti-)hadrons in these collisions can be systematically described by the equal velocity combination of constituent quarks and antiquarks at hadronization. We obtain $p_{T}$ spectra of quarks and antiquarks at hadronization and study their collision energy dependence. We also reproduce the yield densities of hadrons and anti-hadrons. In particular, we demonstrate that yield ratios of anti-hadrons to hadrons $K^{-}/K^{+}$, $\bar{p}/p$, $\barΛ/Λ$, $\barΞ^{+}/Ξ^{-}$ and $\barΩ^{+}/Ω^{-}$ simply correlate with each other and their experimental data except $\barΩ^{+}/Ω^{-}$ at $\sqrt{s_{NN}}=$ 7.7 GeV are systematically described by the model. These results suggest that the equal velocity combination mechanism for quarks and antiquarks at hadronization plays an important role in Au+Au collisions at low RHIC energies ($\sqrt{s_{NN}}\geq$ 11.5 GeV).
