First LHC constraints on anomalously interacting new vector bosons

It was recently proposed to extend the Standard Model by means of new spin-1 chiral \(Z^*\) and \(W^{*\pm}\) bosons with the internal quantum numbers of the electroweak Higgs doublets. These bosons have unique signatures in transverse momentum, angular and pseudorapidity distributions of the final l...

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Bibliographic Details
Published in:arXiv.org 2011-10
Main Authors: Chizhov, M V, Bednyakov, V A, Boyko, I R, Budagov, J A, Demichev, M A, Yeletskikh, I V
Format: Article
Language:English
Subjects:
Angular momentum
Bosons
Large Hadron Collider
Leptons
Neutrinos
Quantum numbers
Transverse momentum
Online Access:Get full text
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Summary:It was recently proposed to extend the Standard Model by means of new spin-1 chiral \(Z^*\) and \(W^{*\pm}\) bosons with the internal quantum numbers of the electroweak Higgs doublets. These bosons have unique signatures in transverse momentum, angular and pseudorapidity distributions of the final leptons, which allow one to distinguish them from other heavy resonances. With 40 pb\(^{-1}\) of the LHC proton-proton data at the energy 7 TeV, the ATLAS detector was used to search for narrow resonances in the invariant mass spectrum of \(e^+e^-\) and \(\mu^+\mu^-\) final states and high-mass charged states decaying to a charged lepton and a neutrino. From the search exclusion mass limits of 1.15 TeV\(/c^2\) and 1.35 TeV\(/c^2\) were obtained for the chiral neutral \(Z^*\) and charged \(W^*\) bosons, respectively. These are the first direct limits on the \(W^*\) and \(Z^*\) boson production.
ISSN:2331-8422