Strangeness production and long-range correlations in pp collisions in string fusion approach

TL;DR

This paper investigates how string fusion affects strange particle correlations in high-energy proton-proton collisions using a Monte Carlo model, revealing new insights into strangeness production and long-range correlations.

Contribution

It introduces a novel Monte Carlo string-parton model incorporating string fusion effects and a new observable for strangeness fraction in events.

Findings

Predicted correlations between strangeness and multiplicity at 7 TeV

Proposed an event-by-event observable for strange particle fraction

Model reproduces experimental cross sections and multiplicity data

Abstract

The effects of string fusion on the correlations in strange particles production in proton-proton collisions at high energy are studied in the framework of a Monte Carlo string-parton model. The model is based on the strings formation in elementary dipole-dipole collisions. The hardness of the elementary interaction is defined by a transverse size of the colliding dipoles. The interaction between strings is realized in the accordance with the string fusion model prescriptions by the introduction of the lattice in the impact parameter plane and taking into account the finite rapidity length of strings. The particles species differentiation is implemented according to Schwinger mechanism. The parameters of the model are fixed with the experimental data on total inelastic cross section and charged multiplicity. In the framework of the model the long-range correlation functions with an accounting of strangeness have been studied. A new intensive event-by-event observable has been proposed, which characterizes the fraction of strange particles in the event. The predictions on the correlations between strangeness, multiplicity and mean transverse momentum are obtained for pp collisions at 7 TeV.