Inclusive cross-sections for gluon production in collision of two projectiles on two targets in the BFKL approach

TL;DR

This paper analyzes inclusive gluon production cross-sections in high-energy collisions of two projectiles on two targets using the BFKL approach, considering multiple emission sources and unitarity constraints.

Contribution

It introduces a comprehensive calculation of gluon production including pomeron, BFKL interactions, and BKP states within the BFKL framework.

Findings

Multiple contributions to gluon production are identified.

The growth of the pomeron contribution may be limited by unitarity.

Potential observability of the BKP state contribution at high energies.

Abstract

Inclusive cross-sections for gluon production in collision of two mucleons with two nucleons are studied in the BFKL approach. Various contributions include emission from the pomerons attached to the participants, from the BFKL interactions in between these pomerons and from the intermediate BKP state. The last contribution may be observable provided the growth with energy of the pomeron contribution is tamed in accordance with unitarity.