Abstract
In this paper, we calculate the inclusive rate of $W^{+} W^{-}$ pair production through leptonic decay channels $W^+W^- \to l^+\nu_l + l^{\prime -} \nu_{l'}$ in the $k_t$-factorization framework. We also consider the exclusive $W^{+} W^{-}$ pair production through the one-loop induced $gg \to H \to W^+W^-$ channel that is important for the study of new physics beyond the Standard Model. The results are compared with predictions from the Herwig 7 event generator in the collinear factorization framework and with the experimental data from the ATLAS and the CMS collaborations. It will be shown that our predictions for the $W^+W^-$ boson pair production signals are in agreement with the experimental data as well as the collinear results.
Highlights
We consider the exclusive WþW− pair production through the one-loop induced gg → H → WþW− channel that is important for the study of new physics beyond the Standard Model
Detecting any deviation from the theoretical predictions of the SM could automatically signal the existence of new physics beyond the Standard Model (BSM)
All treelevel t-channel contributions are colored in red while the histograms related to the Drell-Yan diagrams associated with an exchanged Z0 (γ) gauge vector boson are colored in green
Summary
The production of the WþW− pairs is one of the most important electroweak (EW) processes at the CERN Large Hadron Collider (LHC), that provides a strong test for the viability of the Standard Model (SM) [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]. We calculate the exclusive WþW− pair production through the one-loop induced gg → H → WþW− channel in both kt-factorization and collinear frameworks This channel is important in searching for BSM signal at the LHC. The results of both frameworks are compared with the experimental data from the ATLAS and the CMS collaborations. The existence of a leptonic final-state for a WþW− pair production event provides a clean experimental signature while preventing reconstruction of the H → WþW− resonance The latter, in turn, causes some difficulty for the detection of the background signals and lowers the sensitivity of the experimental measurements [27]. Since it is not possible to calculate the invariant masses of the HGVB in a pair-production event, the process (1) can be considered as an irreducible background signal for many LHC measurements
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