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

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 √s=8 TeV with the CMS detector at the LHC, correspond to an integrated luminosity of 19fb⁻¹. No evidence for anomalous triple gauge couplings is found and the following 95% confidence level limits are set on their values: λ ([−0.011, 0.011]), κγ([−0.044, 0.063]), and Δg^Z₁ ([−0.0087, 0.024]). These limits are also translated into their effective field theory equivalents: c_WWW/Λ²([−2.7, 2.7]TeV⁻²), c_B/Λ² ([−14, 17] TeV⁻²), and c_W/Λ²([−2.0, 5.7]TeV⁻²).