First Observation of Vector Boson Pairs in a Hadronic Final State at the Tevatron Collider

Abstract

We present the first observation in hadronic collisions of the electroweak production of vector boson pairs (VV, V = W, Z) where one boson decays to a dijet final state. The data correspond to 3.5 fb(-1) of integrated luminosity of pp[over ] collisions at sqrt[s] = 1.96 TeV collected by the CDF II detector at the Fermilab Tevatron. We observe 1516 + or - 239(stat) + or - 144(syst) diboson candidate events and measure a cross section sigma(pp[over ]-->VV + X) of 18.0 + or - 2.8(stat) + or - 2.4(syst) + or -1.1(lumi) pb, in agreement with the expectations of the standard model.

Evidence for Diboson Production in the Lepton plus Heavy Flavor Jets Final State at CDF

“…Hadron colliders, both Tevatron and LHC, observed W W , W Z and ZZ production in their fully leptonic decay modes, obtaining excellent agreement with the SM prediction [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

CP-violation in the ZZZ and ZWW vertices at e + e − colliders in Two-Higgs-Doublet Models

“…Anomalous contributions to trilinear electroweak vector boson couplings have been thoroughly studied [1][2][3][4][5] and searched for, at LEP [6], at Fermilab [7][8][9][10] and at the LHC [11][12][13][14][15][16][17][18][19][20][21]. Experimentally, the V W + W − , V = γ, Z (1.1)…”

Measurement of WW + WZ production cross section and study of the dijet mass spectrum in the ℓν + jets final state at CDF

“…The work described in this thesis, along with [24], established the capability of CDF to extract dijet invariant mass peaks of heavy bosons over a large dijet background. Thanks to this work, the W/Z dijet peak in the diboson sample can be considered as a new reference to study and improve techniques to disentangle dijet resonances over huge backgrounds: this will be crucial for low mass Higgs searches at CDF in the W + H → lνbb.…”

“…The first observation was achieved in a final state with two jets and large invisible energy [24]. In the channel with an identified lepton and jets, DØ had evidence of diboson production [25] while CDF published an observation [1].…”