Search for anomalous couplings in boosted WW/WZ →ℓνqq̅ production in proton-proton collisions at √s = 8 TeV

Abstract

This Letter presents a search for new physics manifested as anomalous triple gauge boson couplings in WW and WZ diboson production in proton-proton collisions. The search is performed using events containing a W boson that decays leptonically and a W or Z boson whose decay products are merged into a single reconstructed jet. The data, collected at \(\sqrt{s}\) = 8 TeV with the CMS detector at the LHC, correspond to an integrated luminosity of 19 fb⁻¹. No evidence for anomalous triple gauge couplings is found and the following 95% confidence level limits are set on their values: \(\lambda([-0.011, 0.011), \Delta ᴋ_{\gamma} ([-0.044, 0.063)\), and \(\Delta g_{1}^{Z} ([-0.0087,0.024])\). These limits are also translated into their effective field theory equivalents: \(c_{WWW}/\Lambda^{2} ([-2.7, 2.7] TeV^{-2}), c_{B}/\Lambda^{2} ([-14, 17] TeV^{-2})\), and \(c_{W}/\Lambda^{2} ([-2.0, 5.7] TeV^{-2}\)).