QCD resummation effects in forward $J/\psi$ and very backward jet inclusive production at the LHC

TL;DR

This paper investigates the impact of high-energy resummation effects on the inclusive production of forward J/psi mesons and backward jets at the LHC, using different theoretical models to describe J/psi production.

Contribution

It introduces a new observable involving forward J/psi and backward jets to probe BFKL resummation effects at the LHC, comparing multiple production mechanisms.

Findings

Predictions vary significantly across models.

The observable is sensitive to high-energy resummation effects.

Different mechanisms yield distinct signatures in the production process.

Abstract

We propose and study the inclusive production of a forward $J/\psi$ and a very backward jet at the LHC as an observable to reveal high-energy resummation effects \`a la BFKL. Our different predictions are based on the various existing mechanisms to describe the production of the $J/\psi$, namely, NRQCD singlet and octet contributions, and the color evaporation model.