Recently, the ALICE Collaboration reported an enhancement of the yield ratio of strange and multi-strange hadrons to charged pions as a function of multiplicity at mid-rapidity in proton-proton, proton-lead, lead-lead, and xenon-xenon scattering. ALICE observations provide a strong indication that a quark-gluon plasma is partly formed in high multiplicity events of both small and large colliding systems. Motivated by ALICE's results, we propose a new test for hadronic interaction models used for analyzing ultra-high-energy-cosmic-ray (UHECR) collisions with air nuclei. The test is grounded in the almost equal column-energy density in UHECR-air collisions and lead-lead collisions at the LHC. We applied the test to post-LHC event generators describing hadronic phenomena of UHECR scattering and show that these QCD Monte Carlo-based codes must be retuned to accommodate the strangeness enhancement relative to pions observed in LHC data.

中文翻译：

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通过 ALICE 的镜子进入夸克-胶子等离子体：对用于空气淋浴模拟的强子相互作用模型的新测试

最近，ALICE Collaboration 报告了奇异和多奇异强子与带电介子的产率比的提高，这是质子 - 质子、质子 - 铅、铅 - 铅和氙 - 氙散射中中等速度的多重性的函数。ALICE 的观测提供了一个强有力的迹象，即夸克-胶子等离子体是在小型和大型碰撞系统的高度多重事件中部分形成的。受 ALICE 结果的启发，我们提出了一种新的强子相互作用模型测试，用于分析超高能宇宙射线 (UHECR) 与空气核的碰撞。该测试基于在 LHC 的 UHECR 空气碰撞和铅铅碰撞中几乎相等的柱能量密度。