Eur. Phys. J. C 69, 53-65 (2010)
https://doi.org/10.1140/epjc/s10052-010-1362-y

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

¹ Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, CB3 0HE, UK
² Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, 52056, Aachen, Germany

kom@hep.phy.cam.ac.uk

Received: 17 April 2010
Revised: 24 May 2010
Published online: 25 June 2010

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 W ^± W ^± jj, diboson 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 W ^± Z(γ ^*) production could be observed at the LHC.