Polarised-boson pairs at the LHC with NLOPS accuracy
Giovanni Pelliccioli, Giulia Zanderighi
Abstract
Abstract We present a calculation of inclusive diboson ( $${\textrm{WZ, ZZ, WW}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>WZ, ZZ, WW</mml:mtext> </mml:mrow> </mml:math> ) processes at the LHC in the presence of intermediate polarised weak bosons decaying leptonically, matching next-to-leading-order accuracy in QCD with parton-shower effects. Starting from recent developments in polarised-boson simulation based on the helicity selection at the amplitude level, we have carried out the implementation in the Powheg-Box-Res framework, and validated it against independent fixed-order calculations. A phenomenological analysis in realistic LHC setups, as well as a comparison with recent ATLAS measurements, are presented.