Speaker
Maxime Guilbaud
(Rice University (US))
Description
Observation of a long-range, near-side, two-particle correlation (known as the “Ridge”) in high-multiplicity pp and pPb collisions opened up new opportunities of exploring novel QCD dynamics in small collision systems. While extensive studies of this long-range correlation phenomenon in pPb collisions have revealed its collective properties, the nature of the ridge in pp collisions still remains unknown. Latest measurements of long-range particle correlations in high-multiplicity pp collisions are presented. Anisotropy Fourier harmonics v2 and v3 are extracted as a function of pT and multiplicity, for charged particles, and identified $K^0_s$ and $\Lambda$ hadrons. A multi-paricle cumulant technique is also used to explore the collective nature of the long-range correlations. The results are directly compared with data in pPb and PbPb collisions, which shed light on the physical origin on the novel collective correlations in small systems.
| Collaboration | CMS |
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