Multiplicity description by gluon model

TL;DR

This paper investigates high multiplicity events in proton-proton collisions using the gluon dominance model, which incorporates QCD principles and a hadronization scheme to better describe rare events and their associated phenomena.

Contribution

It introduces the gluon dominance model (GDM) based on QCD and a phenomenological hadronization scheme to explain high multiplicity events.

Findings

GDM better describes topological cross sections in high multiplicity events.

Recombination mechanism of hadronization is supported by the model.

Potential link between soft photon excess and high multiplicity events.

Abstract

Study of high multiplicity events in proton-proton interactions is carried out at the U-70 accelerator (IHEP, Protvino). These events are extremely rare. Usually, Monte Carlo codes underestimate topological cross sections in this region. The gluon dominance model (GDM) was offered to describe them. It is based on QCD and a phenomenological scheme of a hadronization stage. This model indicates a recombination mechanism of hadronization and a gluon fission. Future program of the SVD Collaboration is aimed at studying a long-standing puzzle of excess soft photon yield and its connection with high multiplicity at the U-70 and Nuclotron facility at JINR, Dubna.