论文标题
$ \ \ \ sqrt {s_ {nn}} $ = 17.3 GEV中的proton-proton互动中的$之一的$ξ^{ - } $和$ \overline的
Measurements of $Ξ^{-}$ and $\overlineΞ^{+}$ production in proton-proton interactions at $\sqrt{s_{NN}}$ = 17.3 GeV in the NA61/SHINE experiment
论文作者
论文摘要
在固定的目标实验中,以158 GEV/textIt {C}的光束动量研究了$ξ(1321)^{ - } $和$ \ Overline耳的$ overlinePlline 2(1321)^{+} $超音。速度y和横向动量$ p_ {t} $中的双差分分布是从3300万个无弹性事件的样本中获得的。他们允许将光谱推送到全相空间,并确定$ξ^{ - } $和$ \Overline乏^{+} $的平均多样性。将快速和横向动量光谱与传输模型预测进行比较。在158〜 \ gevc处的非弹性P+P相互作用中的$ξ^{ - } $用于量化A+A碰撞的陌生性增强。
The production of $Ξ(1321)^{-}$ and $\overlineΞ(1321)^{+}$ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 GeV/textit{c}. Double differential distributions in rapidity y and transverse momentum $p_{T}$ are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both $Ξ^{-}$ and $\overlineΞ^{+}$. The rapidity and transverse momentum spectra are compared to transport model predictions. The $Ξ^{-}$ mean multiplicity in inelastic p+p interactions at 158~\GeVc is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.