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Showing 1 to 20 of 49 for “"Z Boson"”.
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Supersymmetric jets from Z boson decay and radiative decays of heavy quarkonium
The first part of this thesis is devoted to analysis of the jet structure in the final state of the supersymmetric process [equation]. For scalar quark production, as for supersymmetric events in general, the signature which will enable supersymmetry to be discovered in future colliders is missing …
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Measurement of cross section times branching ratio for W boson + photon and Z boson + photon and search for anomalous W boson-photon and Z boson-photon couplings at 1.8 TeV
… search for anomalous couplings between the gauge bosons was also carried out using these results. Assuming only one anomalous coupling to be non-zero at a time, the 95% CL limits on $W\gamma$ anomalous couplings are, $-3.7 < \Delta\kappa\ < 3.7, -1.2 < \lambda < 1.2, -3.8 < \tilde\kappa < 3.8$ and …
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Search for gravitons using merged jets from Z boson decays with the ATLAS experiment
… for anomalous production of a pair of gauge bosons (ZZ or WZ) from the decay of a narrow massive resonance. Data corresponding to 2.0 fb-1 of integrated luminosity collected by the ATLAS experiment from proton-proton collisions at 7 TeV. Events with two charged leptons and either two resolved …
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A precise measurement of the left-right cross section asymmetry in Z boson production
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Measurement of Z Boson Transverse Momentum In Proton-Antiproton Collisions At sqrt(s)=1.96 TeV
… describes a measurement of the shape of the boson transverse momentum distribution in $p\bar{p}\rightarrow Z/\gamma^{*}\rightarrow e^+e^- +X$ events at a center-of-mass energy of 1.96 TeV. The measurement is made for events with electron-positron mass between $70 < M_{ee} < 110$ GeV/c$^{2}$ …
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A measurement of W boson-photon and Z boson-photon cross sections in the muon channel in 1.8 TeV proton-antiproton collisions
… sensitive to anomalous couplings of the W and Z bosons. Using the $W\sb{\gamma}$ and $Z\sb{\gamma}$ absolute cross section measurements, the absence of an excess of hard photons accompanying W and Z boson production enables us to obtain direct limites on anomalous $WW\sb{\gamma}$, $ZZ\sb{\gamma}$ …
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Measurement of W and Z boson production cross sections in proton-proton collisions at [square root] s = 5.02TeV and [square root] s = 13TeV
Measurements of W and Z boson production cross sections in pp collisions at [square root] s = 5.02TeV and [square root] s = 13TeV are presented. Data was collected by the CMS experiment at the LHC during low-pileup data taking periods in 2017. The corresponding integrated luminosity for the data is …
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Measurement of the mass and width of the Z boson from Z going to positron-electron decay in antiproton-proton collisions at sqrt.s = 1.8 TeV
… to measure the mass and width of the Z gauge boson from Z $\to$ e$\sp{+}$e$\sp{-}$ decays in pp collisions at $\sqrt{s}$ = 1.8 TeV. The Z $\to$ e$\sp{+}$e$\sp{-}$ data from the CDF detector yields a mass of the Z boson of M$\sb{\rm Z}$ = 90.78 $\pm$ 0.40(stat.) $\pm$ 0.38(syst.) $\pm$ …
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A measurement of sine(2)theta(W) from the forward-backward asymmetry in proton-antiproton going to Z boson positron-electron interactions at sqrt.s = 1.8 TeV
An analysis of the forward-backward asymmetry in Z$\sp{0}$ decays using data from the Collider Detector at Fermilab provides a measurement of sin$\sp2\bar\theta\sb{\rm W}$. The forward-backward asymmetry is measured to be (5.2 $\pm$ 5.9 (stat) $\pm$ 0.4 (sys))%, which implies …
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Search for the standard model Higgs Boson in the Z gamma channel
The Higgs decay into a photon and a Z boson, with the Z boson decaying into an electron-positron pair (electron channel) or muon-antimuon pair (muon channel), allows for accurate reconstructions of the Higgs boson mass and measurement of the Higgs to Z-[gamma] coupling. We explore selection …
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Precision measurement of and search for dark matter in the transverse momentum spectra of Z bosons
A measurement of the differential Z boson production cross section in proton-proton collisions is presented. It furnishes a precision test of the Standard Model, and constrains the parton distribution functions of the proton. Moreover, it is a building block for future measurements of the mass of …
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The hunt for elusive partners in crime: secrets beyond the standard model. Beyond the standard model limits from the search for the associated production of a z boson with a photon in the atlas experiment
Contains fulltext : 321458.pdf (Publisher’s version ) (Open Access)
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Generator-level acceptance for the measurement of the inclusive cross section of W-boson and Z-boson production in pp collisions at [square root of] s = 5 TeV with the CMS detector at the LHC
The inclusive cross section of vector boson production in proton-proton collisions is one of the key measurements for constraining the Standard Model and an important part of the physics program at the LHC. Measurement of the inclusive cross section requires calculating the detector acceptance of …
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Simplified Template Cross Section measurements of associated V H production in the H → b¯b decay channel with √ s = 13 TeV proton-proton collisions at the ATLAS experiment
… measurement of the production of the SM Higgs boson in association with a W or Z boson, where the Higgs boson decays to b ¯b and the W/Z boson (V ) decays leptonically. The data used is the full Run-2 ATLAS dataset, corresponding to 140 fb−1 of integrated luminosity, which was collected in …
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Measurement Of Angular Coefficients Of Drell-Yan E(+) E(-) Pairs In Ppbar Collisions At Square Root Of Center Of Mass Energy Of 1.96 Tev.
… → γ*/Z → e+ e− + X events produced in the Z boson mass region at square root of center of mass energy of 1.96 TeV at the Tevatron. For this analysis, we have used the Run IIb2 dataset collected with the DΦ detector. The angular distributions as a function of the transverse momentum of the …
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Using Z-hadron correlations to probe the medium response in PbPb and pp collisions at √ˢNN = 5.02 TeV
… time. Collision data with at at least one Z boson with 40 <pT <200 GeV/c are analyzed. The azimuthal angle distributions with respect to the Z bosons, whih are sensitive to modification of in-medium parton shower and medium recoils, are measured in central PbPb collisions. A significant …
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Search For Trilepton Resonances From R-Parity Violating Chargino Decays In The B−l Mssm
… charged lepton or neutrino and a W, Z, or Higgs boson. This analysis searches for resonances in the trilepton invariant mass spectrum, targeting events with charginos decaying to three electrons or muons via a leptonically decaying Z boson. The dataset includes 139 1/fb of 13 TeV proton-proton …
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Measurement of the tt̅W and tt̅Z Cross Sections using Proton-Proton Collisions at √s = 8 TeV with the ATLAS Detector
… of top quark pairs in association with a W or Z boson is presented. The measurement uses 20.3 fb−1 of data from proton-proton collisions at √s = 8 TeV collected by the ATLAS detector at the Large Hadron Collider. Four different final states are considered: two opposite-sign leptons, two same-sign …
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Search for the production of quark-gluon plasma in e+e- collisions at [square root of] s = 91.2 GeV with Archived ALEPH LEP1 data
… string between the outgoing qq̄ pair from the Z boson decay. The associated yield distributions in both analyses are in better agreement with predictions from the PYTHIA event generator than those from HERWIG, providing new insights into the hadronization modeling. These results serve as an …
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