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Showing 1 to 20 of 41 for “"W Boson"”.
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Measurement of W Boson Polarization in Top Quark Decay
A measurement of the polarization of the W boson from top quark decay is an excellent test of the V-A form of the charged-current weak interaction in the standard model. Since the longitudinal W boson is intimately related to the electroweak symmetry breaking mechanism, and the standard model gives …
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Measurement of the W boson mass with the ALEPH detector
The W boson mass has been extracted using W-pairs decaying into evqq and mvqq final states. The events were selected from the data collected with the ALEPH detector during the years 1998, 1999 and 2000, corresponding to a total integrated luminosity of about 650 pb-1. A kinematic fit imposing …
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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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Observations and measurement of W boson production and triple gauge couplings at LEP II
… are then used to measure the couplings of Wbosons with Z bosons and photons. Emphasis is placed on the unambiguous and efficient combination of the information from the different production and decay channels. For the couplings in the model in which gauge invariance is realised linearly, the …
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Suppression of the fake lepton background in same-sign W-boson scattering with the ATLAS experiment
Same-sign W-boson scattering is a rare Standard Model process that is useful for probing the nature of electroweak symmetry breaking and the Higgs mechanism. Analysis is currently underway to measure the cross-section to a significance of 5σ or higher using √s = 13 TeV data from the ATLAS …
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Direct Measurement of the W Boson Decay Width in Proton-Antiproton Collisions at sqrt(s)=1.96 TeV
… describes a direct measurement of the W boson total decay width, using the DZero detector at the Fermilab Tevatron Collider. The measurement uses an integrated luminosity of 177.3 pb-1 data, collected during the 2002-2003 run. The width is determined from the shape of the transverse mass …
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Precision measurement of the W boson mass with the CMS Experiment in pp collisions at √s = 13 TeV
The mass of the W boson, mW, is an important fundamental constant of nature, which is also potentially sensitive to a plethora of physics beyond the Standard Model. In this thesis, we discuss the precision measurement of mW with the CMS detector at the LHC in proton-proton collisions at √s = 13 …
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Measurement of Electroweak W Boson Production via Vector‐Boson Fusion in Proton–Proton Collisions at √s = 13 TeV with the CMS Detector
… measurement of the electroweak production of a W boson in association with two jets (pp → W jj) at √s = 13 TeV, using the full Run II dataset recorded by the CMS experiment at the CERN Large Hadron Collider (LHC), corresponding to an integrated luminosity of 138 fb−1. The process, characterised by …
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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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W boson cross sections and single spin asymmetries in polarized proton-proton collisions at [square root of] s =500 GeV at STAR
… look at the spin-dependent production of W+(-) bosons, and hence at the spin-flavor structure of the proton, where the main production mode is through d+u (u+d) annihilation. Using STAR's large Time Projection Chamber and its wide-acceptance electromagnetic calorimeters, it is possible to …
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Measurement of the differential angular distribution of the W boson produced in association with jets in proton-antiproton collisions at sqrt (s)= 1.8 TeV
The full differential cross section of the W boson produced in a proton-antiproton collider can be written as a sum of nine terms. Each term is a product of an analytical expression of the azimuthal and polar angles (cp and 0) of the charged lepton from the W decay measured in the W-rest frame …
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Study of the Higgs Boson Produced in Association with a Weak Boson and Decaying to WW* with a Same Sign Dilepton and Jets Final State in √ s =8 TeV pp Collisions with the ATLAS Detector at the LHC
… is aimed at studying production of a Higgs boson in association with a W boson, in the H → W W ∗ decay mode, using 20 fb −1 of 8 TeV data collected in 2012. The specific final state studied in this thesis has the associated W boson and one of the W bosons from the Higgs decaying …
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Charged Vector Boson (W ±) production in simulated proton-proton collisions at √s = 5.36 TeV.
In this work, the focus is on the charged vector boson (W ±) production in the forward rapidity region of simulated relativistic proton-proton collisions, where the POWHEG and Pythia Monte Carlo (MC) event generators are used to simulate the events of interest for the analysis. The W ± boson …
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Measurement of inclusive and differential cross sections for single top quark production in association with a W boson in proton-proton collisions at √s = 13 TeV
El objetivo principal de esta tesis es el estudio de la producción conjunta de un quark top y un bosón W (proceso tW) usando los datos recogidos por el experimento CMS durante el Run-2 del LHC en colisiones protón-protón a una energía en el centro de masas de √s = 13 TeV y correspondientes a una …
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Measurement of the Differential Angular Distribution of the W Boson Produced in Association With Jets in Proton -Antiproton Collisions at Center of Mass Energy = 1.8 TeV
We also present the Standard Model prediction for the W angular coefficients Ai as a function of pWT , using a W+jet Monte Carlo event generator, which includes gluon loops. The prediction for three of the angular coefficients (A1, A4 and A6) is presented for the first time.
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