Effect of color reconnection and rope formation on resonance production in p$-$p collisions in Pythia 8

TL;DR

This study uses Pythia 8 simulations to analyze how color reconnection and rope formation affect resonance production in proton-proton collisions, revealing dependencies on event activity and strange quark production.

Contribution

It introduces a detailed investigation of resonance yield ratios influenced by microscopic processes like color reconnection and rope hadronization in high-energy p-p collisions.

Findings

Suppression of mesonic resonance ratios with increasing multi-partonic interactions.

Enhancement of strange resonance ratios in high multiplicity events.

Resonance yield ratios are independent of collision energy but depend on event activity.

Abstract

The resonance production in proton$-$proton collisions at $\sqrt{s}$ = 7 TeV and 13 TeV have been investigated using Pythia 8 event generator within the framework of microscopic processes like color reconnection and rope hadronization. Specifically, the observable effects of different modes of color reconnections on the ratio of yields of mesonic and baryonic resonances with respect to their stable counterpart have been explored as a function of event activity. A suppression in the ratio is observed as a function of number of multi-partonic interactions for mesonic resonances. The $\mathrm{\phi/K}$ and $\mathrm{\phi/\pi}$ ratios show an enhancement for high multiplicity events due to enhanced production of strange quarks via the microscopic process of rope hadronization in the partonic phase. The mechanism of the hadronization of color ropes together with the QCD-based color reconnection of partons predicted an enhancement in the ratio for baryonic resonances to non-resonance baryons having similar quark content. The yield ratios of resonances are found to be independent of the collision energy and strongly dependent on event activity.