Probing neutral gauge boson self-interactions in ZZ production at hadron colliders

Abstract

A detailed analysis of ZZ production at the upgraded Fermilab Tevatron and the CERN Large Hadron Collider is presented for general ZZZ and ZZγ couplings. Deviations from the Standard Model gauge theory structure for each of these can be parameterized in terms of two form factors which are severely restricted by unitarity at high energy. Achievable limits on these couplings are shown to be a dramatic improvement over the limits currently obtained by e +

New physics in e + e − → Zγ at the ILC with polarized beams: explorations beyond conventional anomalous triple gauge boson couplings

“…The individual values of these triple gauge boson couplings (TGCs) as described before are zero at tree level in the SM, with non-zero values arising at higher orders or in composite models. These anomalous couplings have been extensively studied in the literature in the context of different colliders 1 [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Moreover there has been a lot of work in the literature [8,10,13,17,23] where effective Lagrangians or effective momentum-space vertices and the associated form factors in neutral gauge boson production have been discussed.…”

“…(3.1), (3.4) that the term proportional to cos θ is CPT odd and would therefore always occur with the imaginary part of the anomalous couplings. The asymmetry is a forward-backward asymmetry 15) with the form…”

Measurement of theWZandZZproduction cross sections using leptonic final states in8.6 fb−Abazov1, Abbott2, Acharya3 et al. 2012Phys. Rev. D300170View full textAdd to dashboardCite

“…T and p (2) T are the p T vectors of the two leptons. The dilepton p T vector is defined as p T = p (1)…”

“…The pair production of W and Z gauge bosons probes the electroweak component of the standard model (SM) as these cross sections are predicted to be significantly larger in the presence of new resonances or anomalous triple-gauge-couplings [1,2]. Diboson production is a major source of background in many search channels for * with visitors from a Augustana College, Sioux Falls, SD, USA, b The University of Liverpool, Liverpool, UK, c UPIITA-IPN, Mexico City, Mexico, d DESY, Hamburg, Germany, e SLAC, Menlo Park, CA, USA, f University College London, London, UK, g Centro de Investigacion en Computacion -IPN, Mexico City, Mexico, h ECFM, Universidad Autonoma de Sinaloa, Culiacán, Mexico, and i Universität Bern, Bern, Switzerland.…”

Observation ofZZProduction inpp¯Collisions ats=1.96 Abazov1, Abbott2, Abolins3 et al. 2008Phys. Rev. Lett.19050View full textAdd to dashboardCite

“…In contrast with other diboson processes, Z boson pair production (ZZ) does not involve trilinear gauge boson interactions within the standard model (SM). The observation of an unexpectedly high cross section could indicate the presence of anomalous ZZZ or ZZγ couplings [2]. The SM prediction for the total ZZ production cross section in pp collisions at the Fermilab Tevatron Collider at √ s = 1.96 TeV is σ(ZZ) = 1.4 ± 0.1 pb [3].…”