Inclusive hadron distributions in p+p collisions from saturation models of HERA DIS data

TL;DR

This paper uses saturation models fitted to HERA DIS data to predict inclusive hadron distributions in proton-proton collisions, showing universal behavior and good agreement with experimental data across energies.

Contribution

It introduces a method combining saturation models with a $k_ot$-factorization framework to predict hadron distributions in p+p collisions, extending the applicability of saturation physics.

Findings

Good agreement of multiplicity distributions with data

Universal behavior of transverse momentum distributions

Validation of saturation models across energies

Abstract

Dipole models based on various saturation scenarios provide reasonable fits to small-x DIS inclusive, diffractive and exclusive data from HERA. Proton un-integrated gluon distributions extracted from such fits are employed in a $k_\bot$-factorization framework to calculate inclusive gluon distributions at various energies. The n-particle multiplicity distribution predicted in the Glasma flux tube approach shows good agreement with data over a wide range of energies. Hadron inclusive transverse momentum distributions expressed in terms of the saturation scale demonstrate universal behavior over a wider kinematic range systematically with increasing center of mass energies.