High \pt{} particle correlations in pp collisions at LHC/ALICE

TL;DR

This paper analyzes high- extit{p}$_T$ particle correlations in proton-proton collisions at the LHC using ALICE data, providing insights into jet fragmentation through two-particle correlation studies.

Contribution

It presents the first ALICE pp data analysis of two-particle correlations with various trigger particles, interpreting results in terms of jet fragmentation functions.

Findings

Correlation patterns depend on the imbalance parameter extit{x}_E

Charged and neutral particles show consistent correlation features

Results contribute to understanding jet fragmentation in pp collisions

Abstract

Two-particle correlation triggered by high-\pt{} particles allows us to study hard scattering phenomena when full jet reconstruction is challenging. An analysis of the first ALICE pp data where charged and neutral particles isolated or not are used as trigger particles is presented. The two-particle correlation between the trigger ($t$) and the associate ($a$) particles is studied as a function of the imbalance parameter \xe=-$\vec{p}_{T_{a}} \cdot \vec{p}_{T_{t}}/\mid \vec{p}_{T_{t}}\mid ^{2}$ and interpreted in terms of jet fragmentation function.