Diffractive pQCD mechanism of exclusive production of W+ W- pairs in proton-proton collisions

We present a study of central exclusive production of W + W -pairs in proton-proton collisions at the LHC.We compare the contribution of the γγ → W + W -mechanism with a new mechanism of exclusive diffractive production through the gg → W + W -subprocess with intermediate virtual Higgs boson and quark box diagrams.The amplitude for the latter process is expressed in terms of the off-diagonal unintegrated gluon distribution functions.Several observables related to this process are calculated.The phase space integrated diffractive contribution when separated is only a small fraction of fb compared to 115.4 fb of the γγ-contribution without absorption.This opens a possibility of efficient searches for anomalous boson γW + W -and γγW + W -couplings due to new physics beyond Standard Model.

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