Same-sign W pair production as a probe of double parton scattering at the LHC

TL;DR

This paper investigates same-sign W boson pair production via double parton scattering at the LHC, highlighting the impact of advanced double parton distribution functions on kinematic correlations and exploring the potential for experimental observation.

Contribution

It introduces the use of GS09 double parton distribution functions to reveal non-trivial kinematic correlations in same-sign W pair production at the LHC.

Findings

Potential observation of a small excess of same-sign dilepton events from double parton scattering.

Demonstrates the importance of advanced dPDFs in understanding W pair production.

Analyzes background processes and experimental signatures at 14 TeV.

Abstract

We study the production of same-sign W boson pairs at the LHC in double parton interactions. Compared with simple factorised double parton distributions (dPDFs), we show that the recently developed dPDFs, GS09, lead to non-trivial kinematic correlations between the W bosons. A numerical study of the prospects for observing this process using same-sign dilepton signatures, including same-sign WWjj, di-boson and heavy flavour backgrounds, at 14 TeV centre-of-mass energy is then performed. It is shown that a small excess of same-sign dilepton events from double parton scattering over a background dominated by single scattering WZ(gamma*) production could be observed at the LHC.