Strangeness production in two-particle azimuthal correlations on the near and away side measured with ALICE in pp collisions at 7 TeV

TL;DR

This study investigates strange particle production in two-particle azimuthal correlations in proton-proton collisions at 7 TeV using ALICE, focusing on jet fragmentation and improving the measurement accuracy of strange baryon to meson ratios.

Contribution

It presents the first detailed analysis of correlations between charged trigger particles and strange baryons and mesons, including a new feeddown correction method for $\\Lambda$ particles.

Findings

Observation of azimuthal correlation enhancements at near and away side angles.

Implementation of a data-driven feeddown correction for $\\Lambda$ baryons.

Potential for more accurate primary $\\Lambda$/K$_{S}^{0}$ ratio measurements.

Abstract

Two-particle azimuthal correlations allow one to study high-$p_{\rm T}$ parton fragmentation without full jet reconstruction. Enhancements of the azimuthal correlations are seen at $\Delta \varphi \approx 0$ and $\Delta \varphi \approx \pi$, resulting from back-to-back jet fragmentation in the parton center-of-mass system. We present the current status of the study of correlations between charged trigger particles and associated strange baryons ($\Lambda$) and mesons (K$_{S}^{0}$) in pp collisions at $\sqrt{s}$ = 7 TeV. A data-driven feeddown correction for $\Lambda$ is also presented, which could allow a more accurate calculation of the primary $\Lambda/$K$_{S}^{0}$ ratio in jets and the underlying event.