论文标题
$ {\ rm k}^{0} _ {\ rm {s}} $，$λ$（$ \barλ$），$ξ^{\ pm} $和$ω^{\ pm} $ jet in pp＆pb $ - $ pb colusion
Production of ${\rm K}^{0}_{\rm{S}}$, $Λ$ ($\barΛ$), $Ξ^{\pm}$ and $Ω^{\pm}$ in jets and in the underlying event in pp and p$-$Pb collisions
论文作者
论文摘要
奇怪的hadron（k $^{0} _ {\ rm s} $，$λ$，$λ$，$λ$，$ξ^{\ pm} $和$ω^{\ pm} $），baryon to-meson to-meson比率（$λ/{\ rm k} k}^0 _ {\ rm s} $和$ω/{\ rm k}^0 _ {\ rm s} $）和baryon to-baryon比率（$ξ/λ$，$ω$，$ω/λ$，$ω/λ$，$ω/λ$，$ω/ξ$）与jets and prederm and prectry a formence and prectry are prompress a formem and proms { $ \ sqrt {s} = 13 $ tev和p-pb碰撞的t} $）在$ \ sqrt {s _ {\ rm nn}} = 5.02 $ tev与爱丽丝检测器在LHC处。还报道了同一颗粒物种和相应比率的包含生产。首次测量了多震动Hadron的生产，$ξ^{\ pm} $和$ω^{\ pm} $，以及它们在喷气机和基础事件中的相关粒子比率首次测量。在PP和P-PB碰撞中，在喷气机中测得的Baryon-Meson和Baryon与巴里昂的收益率与低和中间的强子$ p _ {\ rm t} $（0.6 $ -6 $ -6 GEV/$ C $）的包含颗粒产量不同。在基础事件中测得的比率又类似于用于包容性颗粒产生的比率。在PP碰撞中，将喷气机中的粒子产生与毕曲霉8的预测进行了比较，并具有三种彩色连接实施模式。它们都没有完全重现测得的强子$ p _ {\ rm t} $区域中的数据。观察到$ξ^{\ pm} $和$ω^{\ pm} $的最大偏差，该偏差达到约6倍。在P-PB碰撞中，与基础事件中观察到的相反，喷气机中颗粒产生的颗粒产生没有显着的事件 - 多物质依赖性。提出的测量结果对强国及其蒙特卡洛描述提供了新的限制。特别是，它们表明，单独的喷气机的碎片不足以描述LHC Energies的HADRONIC碰撞中奇怪而多震动的粒子产生。
The production of strange hadrons (K$^{0}_{\rm S}$, $Λ$, $Ξ^{\pm}$, and $Ω^{\pm}$), baryon-to-meson ratios ($Λ/{\rm K}^0_{\rm S}$, $Ξ/{\rm K}^0_{\rm S }$, and $Ω/{\rm K}^0_{\rm S}$), and baryon-to-baryon ratios ($Ξ/Λ$, $Ω/Λ$, and $Ω/Ξ$) associated with jets and the underlying event were measured as a function of transverse momentum ($p_{\rm T}$) in pp collisions at $\sqrt{s} = 13$ TeV and p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV with the ALICE detector at the LHC. The inclusive production of the same particle species and the corresponding ratios are also reported. The production of multi-strange hadrons, $Ξ^{\pm}$ and $Ω^{\pm}$, and their associated particle ratios in jets and in the underlying event are measured for the first time. In both pp and p-Pb collisions, the baryon-to-meson and baryon-to-baryon yield ratios measured in jets differ from the inclusive particle production for low and intermediate hadron $p_{\rm T}$ (0.6$-$6 GeV/$c$). Ratios measured in the underlying event are in turn similar to those measured for inclusive particle production. In pp collisions, the particle production in jets is compared with PYTHIA 8 predictions with three colour-reconnection implementation modes. None of them fully reproduces the data in the measured hadron $p_{\rm T}$ region. The maximum deviation is observed for $Ξ^{\pm}$ and $Ω^{\pm}$, which reaches a factor of about six. In p-Pb collisions, there is no significant event-multiplicity dependence for particle production in jets, in contrast to what is observed in the underlying event. The presented measurements provide novel constraints on hadronisation and its Monte Carlo description. In particular, they demonstrate that the fragmentation of jets alone is insufficient to describe the strange and multi-strange particle production in hadronic collisions at LHC energies.
