Speaker
Description
In ultrarelativistic collisions of nuclear matter, one of the emerging topics is the possible formation of quark-gluon plasma (QGP) droplets in small collision systems. Recent measurements with flow-like behavior imply collectivity in high-multiplicity pp collisions at the LHC. It is also crucial to look for evidence of possible jet-quenching effects in such systems. The results of jet quenching studies in pp collisions at $\sqrt{s} = 13$ TeV will be discussed. The di-hadron correlations are measured for various $p_{\rm T}$-intervals as a function of charged particle multiplicity. Since small collision systems are biased through non-flow effects such as jets, it is important to develop methods for unbiased flow measurements. The recent progress in non-flow subtraction used to measure flow in small collision systems will be discussed [1,2]. These studies offer the testing of the limit of multiplicity for flow signals in small systems. This method will also be applied in studying the charm flow and fragmentation in small systems by accounting for the sophisticated background subtraction involved in $D^0$ meson studies. Furthermore, these results will be compared to various model calculations such as PYTHIA8, PYTHIA String shoving, EPOS, AMPT, and JETSCAPE, wherever possible.
References:
1. Phys. Rev. C 108, 034909 (2023)
2. ALICE Collaboration, JHEP 03 (2024) 092
