Searches for Double Parton Scattering at the LHC

TL;DR

This paper investigates double parton scattering at the LHC by analyzing muon pair production in proton-proton collisions, estimating the contribution of double parton interactions using Monte Carlo simulations.

Contribution

It introduces a method to estimate double parton scattering fractions at 14 TeV using Herwig++ and analyzes specific background processes in W+ boson pair production.

Findings

Double parton scattering contributes about 25% to the muon pair final state.

The estimated double parton scattering cross section is approximately 0.94 fb.

Background processes like W+W+ jj, W+Z, ZZ, and tt' are significant in the analysis.

Abstract

Searches for the kinematic selection criteria for estimation of multiple parton interaction fraction in 14 TeV pp collisions are presented using the eikonalization of the cross section implemented in the Herwig++ Monte Carlo event generator. W+ boson pair production is studied in the muon decay channel. Four types of the main background processes are discussed and analyzed. These include W+W+ jj, W+Z, ZZ, and tt' productions of the positively charged muon pairs. The double parton scattering contribution to the requested di-muon final state is found to be around 25 per cent with the production cross section of 0.94 fb.