Recent observations of QGP-like phenomena in small collision systems like p+p and p+A collisions have questioned our understanding of the basic paradigms of high energy heavy-ion physics. A brief discussion of these new aspects in small systems which in turn influence our understanding of hard probes like heavy quarks has been provided. Furthermore, a closer observation of the two-particle Hanbury-Brown Twiss (HBT) interferometry measurements provides new insights in our understanding of medium-like phenomena in small systems. An outlook of future goals and measurements is also made.

中文翻译：

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小型系统中的观点：重夸克和HBT半径

最近在小碰撞系统（如p + p和p + A碰撞）中观察到类似QGP的现象，质疑了我们对高能重离子物理基本范式的理解。简要讨论了小型系统中的这些新方面，这些方面反过来又影响了我们对重夸克等硬质探针的理解。此外，对两粒子Hanbury-Brown Twiss（HBT）干涉测量法的更仔细观察为我们对小型系统中类似介质现象的理解提供了新的见解。还对未来的目标和度量进行了展望。