PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Poster Session
Measurement of $R_{2}(\Delta\eta, \Delta\varphi)$ and $P_{2}(\Delta\eta, \Delta\varphi)$ correlation functions in pp collisions at $\sqrt{\textit{s}}$ = 13~TeV using ALICE data
B. Sahoo
Full text: pdf
Pre-published on: December 06, 2022
Published on:
Abstract
Two-particle normalized cumulants of particle number correlations ($R_{2}$)
and transverse momentum correlations ($P_{2}$)[1], measured as a function of
relative pseudorapidity and azimuthal angle difference $(\Delta\eta, \Delta\varphi)$,
provide key information about particle production mechanisms,
diffusivity, and conservation of charge and momentum in high-energy
collisions. To complement the recent ALICE measurements in Pb--Pb
collisions, as well as for better understanding of the jet
contribution and nature of collectivity in small systems, these
observables are measured in pp collisions at $\sqrt{\textit{s}}$ = 13 TeV
with similar transverse momentum range, 0.2 $\leq$ $\textit{p}_{\rm T}$ $\leq$ 2.0
$\rm{GeV}/\textit{c}$. The $R_{2}$ and $P_{2}$ results on the near-
and away-side are qualitatively similar, but differ quantitatively. A
much narrower near-side peak is observed for $P_{2}$ compared to
$R_{2}$ for both charge-independent and charge-dependent combinations,
as in the recently published ALICE results for p--Pb and Pb--Pb
collisions[2]. Since these results are sensitive to the interplay between the underlying event and mini-jets in pp collisions, they not only establish a baseline for heavy-ion collisions, but also allow a better understanding of signals that are compatible with the presence of collective effects in small systems.
DOI: https://doi.org/10.22323/1.414.1138
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.