Long- and short-range correlations and their event-scale dependence in high-multiplicity pp collisions at √s = 13 TeV
Two-particle angular correlations are measured in high-multiplicity protonproton collisions at √ s = 13 TeV by the ALICE Collaboration. The yields of particle pairs at short-(∆η ∼ 0) and long-range (1.6 < |∆η| < 1.8) in pseudorapidity are extracted on the near-side (∆ϕ ∼ 0). They are reported as a f...
| Autores: | ; ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2021 |
| País: | Brasil |
| Institución: | UFRGS |
| Repositorio: | Repositório Institucional da UFRGS |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/233100 |
| Acceso en línea: | http://hdl.handle.net/10183/233100 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Aceleradores de partículas Colisões proton-proton Colisao de ions pesados Heavy Ion Experiments |
| Sumario: | Two-particle angular correlations are measured in high-multiplicity protonproton collisions at √ s = 13 TeV by the ALICE Collaboration. The yields of particle pairs at short-(∆η ∼ 0) and long-range (1.6 < |∆η| < 1.8) in pseudorapidity are extracted on the near-side (∆ϕ ∼ 0). They are reported as a function of transverse momentum (pT) in the range 1 < pT < 4 GeV/c. Furthermore, the event-scale dependence is studied for the first time by requiring the presence of high-pT leading particles or jets for varying pT thresholds. The results demonstrate that the long-range “ridge” yield, possibly related to the collective behavior of the system, is present in events with high-pT processes as well. The magnitudes of the short- and long-range yields are found to grow with the event scale. The results are compared to EPOS LHC and PYTHIA 8 calculations, with and without string-shoving interactions. It is found that while both models describe the qualitative trends in the data, calculations from EPOS LHC show a better quantitative agreement for the pT dependency, while overestimating the event-scale dependency |
|---|