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19 papers · 1 filter
Model-independent measurement of the W boson helicity in top quark decays
D0 Collaboration, V. M. Abazov
We present the first model-independent measurement of the helicity of bosons produced in top quark decays, based on a 1 fb sample of candidate events in the d…
First measurement of the forward-backward charge asymmetry in top quark pair production
D0 Collaboration, V. M. Abazov
We present the first measurement of the integrated forward-backward charge asymmetry in top-antitop quark pair (ttbar) production in proton-antiproton collisions in the lepton plus…
Search for ZZ and Zγ^* production in p-barp collisions at sqrt(s) = 1.96 TeV and limits on anomalous ZZZ and ZZγ^* couplings
D0 Collaboration, V. Abazov
We present a study of four muon, four electron, and two muon two electron events using 1 fb^(-1) of data collected with the D0 detector at the Fermilab Tevatron p-barp Collider at…
A combined search for the standard model Higgs boson at sqrt{s}=1.96 TeV
D0 Collaboration, V. M. Abazov
We present new results of the search for WH to lepton neutrino b b production in ppbar collisions at a center of mass energy of sqrt{s}=1.96 TeV, based on a dataset with integrated…
Search for squarks and gluinos in events with jets and missing transverse energy using 2.1 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV
D0 Collaboration, V. Abazov
A data sample corresponding to an integrated luminosity of 2.1 fb-1 collected by the D0 detector at the Fermilab Tevatron Collider was analyzed to search for squarks and gluinos pr…
Measurement of the B0_s semileptonic branching ratio to an orbitally excited D_s** state, Br(B0_s -> Ds1(2536) mu nu)
D0 Collaboration, V. Abazov
In a data sample of approximately 1.3 fb-1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state D_s1(2536) has been observed with a measured mass…
Measurement of the shape of the boson transverse momentum distribution in ppbar -> Z/gamma* -> ee+X events produced at sqrt{s}=1.96 TeV
D0 Collaboration, V. Abazov
We present a measurement of the shape of the Z/gamma* boson transverse momentum (qT) distribution in ppbar -> Z/gamma* -> ee+X events at a center-of-mass energy of 1.96 TeV using 0…
Search for Supersymmetry in Di-Photon Final States at sqrt{s} = 1.96 TeV
V. M. Abazov
We report results of a search for supersymmetry (SUSY) with gauge-mediated symmetry breaking in di-photon events collected by the D0 experiment at the Fermilab Tevatron Collider in…
Design and Implementation of the New D0 Level-1 Calorimeter Trigger
M. Abolins
Increasing luminosity at the Fermilab Tevatron collider has led the D0 collaboration to make improvements to its detector beyond those already in place for Run IIa, which began in…
Search for Bs --> mu+ mu- at D0
D0 Collaboration, V. Abazov
We report results from a search for the decay Bs --> mu+ mu- using 1.3/fb of pbar p collisions at sqrt(s)= 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron Collider…
Direct observation of the strange b baryon Xi_b^{-}
D0 Collaboration, V. Abazov
We report the first direct observation of the strange b baryon Xi_b^{-}. We reconstruct the decay Xi_b^{-} to J/psi Xi^{-}, with J/psi to dimuons and Xi^{-} to Lambda pion, in ppba…
Zgamma production and limits on anomalous ZZgamma and Zgammagamma couplings in ppbar collisions at sqrt(s) = 1.96 TeV
D0 Collaboration, V. Abazov
We present a study of eegamma and mumugamma events using 1109 (1009) pb-1 of data in the electron (muon) channel, respectively. These data were collected with the D0 detector at th…
Search for a Higgs boson produced in association with a Z boson in ppbar collisions
D0 Collaboration, V. Abazov
We describe a search for the standard model Higgs boson with a mass of 105 GeV/c^2 to 145 GeV/c^2 in data corresponding to an integrated luminosity of approximately 450 pb^{-1} col…
Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda
D0 Collaboration, V. Abazov
We have measured the Lambda_b lifetime using the exclusive decay Lambda_b to J/psi Lambda, based on 1.2 fb-1 of data collected with the D0 detector during 2002-2006. From 171 recon…
Measurement of the branching fraction Br(Bs -> Ds(*) Ds(*))
D0 Collaboration, V. Abazov
We report a measurement of the branching fraction Br(Bs -> Ds(*) Ds(*)) using a data sample corresponding to 1.3 fb^{-1} of integrated luminosity collected by the D0 experiment in…
Combined D0 Measurements Constraining the CP-violating Phase and Width Difference in the System
D0 Collaboration, V. M. Abazov
We combine the D0 measurement of the width difference between the light and heavy B_s^0 mass eigenstates and of the CP-violating mixing phase determined from the time-dependent ang…
Measurement of the shape of the boson rapidity distribution for p\bar{p}-> Z/gamma*-> e+e- +X events produced at sqrt(s) of 1.96 TeV
D0 Collaboration, V. Abazov
We present a measurement of the shape of the boson rapidity distribution for p\bar{p}-> Z/gamma*-> e+e- +X events at a center-of-mass energy of 1.96 TeV. The measurement is made fo…
Measurement of the top quark mass in the lepton+jets channel using the Ideogram Method
D0 Collaboration, V. Abazov
A measurement of the top quark mass using events with one charged lepton, missing transverse energy, and jets in the final state, collected by the D0 detector from p-pbar collision…
Search for production of single top quarks via flavor-changing neutral currents at the Tevatron
D0 Collaboration, V. Abazov
We search for the production of single top quarks via flavor-changing neutral current couplings of a gluon to the top quark and a charm (c) or up (u) quark. We analyze 230 pb^{-1}…