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arXiv · 1206.2754

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

Piotr Lebiedowicz·Roman Pasechnik·Antoni Szczurek
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Abstract

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 $γγ\to W^+ W^-$ mechanism with a new mechanism of exclusive diffractive production through the $gg \to W^+ W^-$ 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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Piotr Lebiedowicz, Roman Pasechnik, Antoni Szczurek. 2012-06-13. Diffractive pQCD mechanism of exclusive production of $W^+ W^-$ pairs in proton-proton collisions. https://arxiv.org/abs/1206.2754

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