# Multi-parton interactions and rapidity gap survival probability in jet-gap-jet processes

## TL;DR

This paper investigates how multi-parton interactions affect the survival of rapidity gaps in jet-gap-jet processes at the LHC, using a dynamical MPI model integrated into Pythia 8 to simulate and analyze the phenomena.

## Contribution

It introduces a dynamical multi-parton interaction model tuned to underlying event data for studying rapidity gap destruction in jet-gap-jet events at the LHC.

## Key findings

- MPI effects significantly reduce rapidity gap survival probability.
- The ratio of cross sections with and without MPI varies with rapidity gap.
- Differential distributions illustrate the impact of MPI on jet-gap-jet processes.

## Abstract

We discuss an application of dynamical multi-parton interaction model, tuned to measurements of underlying event topology, for a description of destroying rapidity gaps in the jet-gap-jet processes at the LHC. We concentrate on the dynamical origin of the mechanism of destroying the rapidity gap. The cross section for jet-gap-jet is calculated within LL BFKL approximation. We discuss the topology of final states without and with the MPI effects. We discuss some examples of selected kinematical situations (fixed jet rapidities and transverse momenta) as distributions averaged over the dynamics of the jet-gap-jet scattering. The color-singlet ladder exchange amplitude for the partonic subprocess is implemented into the \textsc{Pythia 8} generator, which is then used for hadronisation and for the simulation of the MPI effects. Several differential distributions are shown and discussed. We present the ratio of cross section calculated with and without MPI effects as a function of rapidity gap in between the jets.