"Table 18" of "Multi-strange baryon production in p-Pb collisions at $\sqrt{s_\mathbf{NN}}=5.02$"

CERN-LHC. The multi-strange baryon yields in Pb--Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, $\Xi$ and $\Omega$ production rates have been measured with the ALICE experiment as a function of transverse momentum, ${p_{\rm T}}$, in p-Pb collisions at a centre-of-mass energy of ${\sqrt{s_{\rm NN}}}$ = 5.02 TeV. The results cover the kinematic ranges 0.6 GeV/$c<{p_{\rm T}} <$7.2 GeV/$c$ and 0.8 GeV/$c<{p_{\rm T}}<$ 5 GeV/$c$, for $\Xi$ and $\Omega$ respectively, in the common rapidity interval -0.5 $<{y_{\rm CMS}}<$ 0. Multi-strange baryons have been identified by reconstructing their weak decays into charged particles. The ${p_{\rm T}}$ spectra are analysed as a function of event charged-particle multiplicity, which in p-Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb-Pb collisions. The measured ${p_{\rm T}}$ distributions are compared to the expectations from a Blast-Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p-Pb. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb-Pb collisions. A statistical model is employed, which describes the change in the ratios with volume using a canonical suppression mechanism, in which the small volume causes a species-dependent relative reduction of hadron production. The calculations, in which the magnitude of the effect depends on the strangeness content, show good qualitative agreement with the data.

欧洲核子研究中心大型强子对撞机（CERN-LHC）。研究表明，铅-铅（Pb-Pb）碰撞中的多奇异重子产额相较于质子-质子（pp）反应呈现出增强效应。本工作利用ALICE实验（ALICE），测量了质心系能量$sqrt{s_{
m NN}}$ = 5.02 TeV下质子-铅（p-Pb）碰撞中$Xi$和$Omega$的产生率随横向动量（$p_{
m T}$）的变化关系。该结果覆盖的运动学范围分别为：$Xi$对应$0.6 mathrm{GeV}/c < p_{
m T} <7.2 mathrm{GeV}/c$，$Omega$对应$0.8 mathrm{GeV}/c < p_{
m T} <5 mathrm{GeV}/c$，且均处于共同的快度区间$-0.5 < y_{
m CMS} <0$内。多奇异重子通过重构其弱衰变至带电粒子的末态得以识别。我们对横向动量谱开展了分析，将其作为事件带电粒子多重数的函数；质子-铅碰撞中的带电粒子多重数跨度达一个数量级，且介于质子-质子与铅-铅碰撞的观测值之间。将测得的横向动量分布与爆炸波（Blast-Wave）模型的预期结果进行对比。描述较轻强子种类产生的参数，同样能够描述高多重数质子-铅碰撞中的超子能谱。我们对超子相对于带电π介子的产额展开研究，并将结果与质子-质子及铅-铅碰撞的测量结果进行对比。本研究采用统计模型，该模型借助正则抑制机制（canonical suppression mechanism）描述产额比随碰撞体积的变化规律：较小的碰撞体积会导致强子产生出现依赖于粒子种类的相对压低效应。该计算结果的效应强弱取决于粒子的奇异数含量，其与实验数据展现出良好的定性一致性。