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arXiv 2107.11209nucl-exhep-ex
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在$\sqrt{s} = 13$ TeV pp碰撞中K $^{0}_{\rm S}$ -和(反)PDMATHAAB-强子关联

K$^{0}_{\rm S}$- and (anti-)$Λ$-hadron correlations in pp collisions at $\sqrt{s} = 13$ TeV

ALICE Collaboration

摘要:

利用ALICE装置测量了$\sqrt{s} = 13$ TeV pp碰撞中的两粒子方位角关联,探讨了在产生横动量为$p_{\rm T} > 3$ GeV/c的奇异介子($^{0}_{\rm S}$)或重子($Λ$)的条件下,喷注碎裂过程中的奇异性和多重性效应以及体产生和硬产生之间的过渡区.在中快度下,对最小偏置事件和事件多重性函数,给出了广泛的触发粒子($3 < p_{\rm T}^{\rm trigg} < 20$ GeV/ $c$)和伴随粒子$p_{\rm T}$(1 GeV/ $c$ $< p_{\rm T}^{\rm assoc} < p_{\rm T}^{\rm trigg}$)的K介子或$Λ$超子与其他强子之间的方位角关联。比较了K $^{0}_{\rm S}$或$Λ$($\overlineΛ$)作为触发粒子与内含强子(一个以π介子为主的样品)的情况下的近侧和远侧峰产额。此外,测量结果与PYTHIA 8和EPOS LHC事件发生器的预测进行了比较。

英文摘要:

Two-particle azimuthal correlations are measured with the ALICE apparatus in pp collisions at $\sqrt{s} = 13$ TeV to explore strangeness- and multiplicity-related effects in the fragmentation of jets and the transition regime between bulk and hard production, probed with the condition that a strange meson (K$^{0}_{\rm S}$) or baryon ($Λ$) with transverse momentum $p_{\rm T} > 3$ GeV/c is produced. Azimuthal correlations between kaons or $Λ$ hyperons with other hadrons are presented at midrapidity for a broad range of the trigger ($3 < p_{\rm T}^{\rm trigg} < 20$ GeV/$c$) and associated particle $p_{\rm T}$ (1 GeV/$c$ $< p_{\rm T}^{\rm assoc} < p_{\rm T}^{\rm trigg}$), for minimum-bias events and as a function of the event multiplicity. The near- and away-side peak yields are compared for the case of either K$^{0}_{\rm S}$ or $Λ$($\overlineΛ$) being the trigger particle with that of inclusive hadrons (a sample dominated by pions). In addition, the measurements are compared with predictions from PYTHIA 8 and EPOS LHC event generators.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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