Measurement Of W W Production And Search For The Higgs Boson In Pp Collisions At Sqrts
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| Total Pages | : 47 |
| Release | : 2011 |
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Download Measurement of $W+̂ W-̂$ Production and Search for the Higgs Boson in Pp Collisions at Sqrt(s) Book in PDF, Epub and Kindle
A measurement of WW production in pp collisions at sqrt(s) = 7 TeV and a search for the Higgs boson are reported. The WW candidates are selected in events with two leptons, either electrons or muons. The measurement is performed using LHC data recorded with the CMS detector, corresponding to an integrated luminosity of 36 inverse picobarns. The pp to WW cross section is measured to be 41.1 +/- 15.3 (stat) +/- 5.8 (syst) +/- 4.5 (lumi) pb, consistent with the standard model prediction. Limits on WW gamma and WWZ anomalous triple gauge couplings are set. The search for the standard model Higgs boson in the WW decay mode does not reveal any evidence of excess above backgrounds. Limits are set on the production of the Higgs boson in the context of the standard model and in the presence of a sequential fourth family of fermions with high masses. In the latter context, a Higgs boson with mass between 144 and 207 GeV is ruled out at 95% confidence level.
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| Release | : 2016 |
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Download Measurement of the Transverse Momentum Spectrum of the Higgs Boson Produced in Pp Collisions at Sqrt(s) Book in PDF, Epub and Kindle
The cross section for Higgs boson production in pp collisions is studied using the H to WW decay mode, followed by leptonic decays of the W bosons to an oppositely charged electron-muon pair in the final state. The measurements are performed using data collected by the CMS experiment at the LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.4 inverse-femtobarns. The Higgs boson transverse momentum (pT) is reconstructed using the lepton pair pT and missing pT. The differential cross section times branching fraction is measured as a function of the Higgs boson pT in a fiducial phase space defined to match the experimental acceptance in terms of the lepton kinematics and event topology. The production cross section times branching fraction in the fiducial phase space is measured to be 39 +/- 8 (stat) +/- 9 (syst) fb. The measurements are found to agree, within experimental uncertainties, with theoretical calculations based on the standard model.
| Author | : Tomo Lazovich |
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| Release | : 2016 |
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Download Observation of the Higgs Boson in the WW* Channel and Search for Higgs Boson Pair Production in the Bb̄bb̄ Channel with the ATLAS Detector Book in PDF, Epub and Kindle
This dissertation presents the observation and measurement of the Higgs boson in the H→ WW*→ l[nu]l[nu] channel at √s = 7 TeV and √s = 8 TeV and a search for Higgs pair production in the HH→ bb̄bb̄ channel at √s = 13 TeV with the ATLAS detector in pp collisions at the Large Hadron Collider.
| Author | : [Study Group] ATLAS Collaboration CERN |
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| Total Pages | : 0 |
| Release | : 2022 |
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Download Measurement of Higgs Boson Decay Into B-quarks in Associated Production with a Top-quark Pair in Pp Collisions at [square Root]s Book in PDF, Epub and Kindle
Abstract: The associated production of a Higgs boson and a top-quark pair is measured in events characterised by the presence of one or two electrons or muons. The Higgs boson decay into a b-quark pair is used. The analysed data, corresponding to an integrated luminosity of 139 fb−1, were collected in proton-proton collisions at the Large Hadron Collider between 2015 and 2018 at a centre-of-mass energy of s√ = 13 TeV. The measured signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model, is 0.35+0.36−0.34. This result is compatible with the Standard Model prediction and corresponds to an observed (expected) significance of 1.0 (2.7) standard deviations. The signal strength is also measured differentially in bins of the Higgs boson transverse momentum in the simplified template cross-section framework, including a bin for specially selected boosted Higgs bosons with transverse momentum above 300 GeV
| Author | : David Hall |
| Publisher | : Springer |
| Total Pages | : 0 |
| Release | : 2016-10-15 |
| Genre | : Science |
| ISBN | : 9783319369655 |
Download Discovery and Measurement of the Higgs Boson in the WW Decay Channel Book in PDF, Epub and Kindle
This thesis describes the stand-alone discovery and measurement of the Higgs boson in its decays to two W bosons using the Run-I ATLAS dataset. This is the most precise measurement of gluon-fusion Higgs boson production and is among the most significant results attained at the LHC. The thesis provides an exceptionally clear exposition on a complicated analysis performed by a large team of researchers. Aspects of the analysis performed by the author are explained in detail; these include new methods for evaluating uncertainties on the jet binning used in the analysis and for estimating the background due to associated production of a W boson and an off-shell photon. The thesis also describes a measurement of the WW cross section, an essential background to Higgs boson production. The primary motivation of the LHC was to prove or disprove the existence of the Higgs boson. In 2012, CERN announced this discovery and the resultant ATLAS publication contained three decay channels: gg, ZZ, and WW.
| Author | : Fangzhou Zhang |
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| Total Pages | : 0 |
| Release | : 2017 |
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Download Measurements of the Higgs Boson Production and Decay Rates and Coupling Strengths Using [pp] Collision Data at [square Root] S Book in PDF, Epub and Kindle
| Author | : |
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| Total Pages | : 284 |
| Release | : 2014 |
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Download Search for the Higgs Boson Decaying to W+W- with Associated Jets and Measurement of the W+W- Production Cross Section and Differential Cross Sections with Jets in Ppbar Collisions at Square Root S Book in PDF, Epub and Kindle
A cross section measurement for the production of W+W- is performed. Differential measurements are reported as a function of jet multiplicity and transverse energy. The inclusive cross section is measured to be sigma(ppbar -> W+W- +X = 14.0 +/-0.6(stat) +1.2/-1.0(syst) +/-0.8(lumi) pb, consistent with the Standard Model prediction. Additionally, a search for the Higgs boson is performed in the final state of W+W- with two or more associated jets. Limits on the production cross section are set at the 95% confidence level, and combined with limits from related analyses. Both analyses use data collected by the CDF II detector from 9.7 fb-1 of luminosity
| Author | : John Alison |
| Publisher | : Springer |
| Total Pages | : 314 |
| Release | : 2014-09-11 |
| Genre | : Science |
| ISBN | : 331910344X |
Download The Road to Discovery Book in PDF, Epub and Kindle
The research presented here includes important contributions on the commissioning of the ATLAS experiment and the discovery of the Higgs boson. The thesis describes essential work on the alignment of the inner tracker during the commissioning of the experiment and development of the electron identification algorithm. The subsequent analysis focuses on the search for the Higgs boson in the WW channel, including the development of a method to model the critical W+jet background. In addition, the thesis provides excellent introductions, suitable for non-specialists, to Higgs physics, to the LHC, and to the ATLAS experiment.
| Author | : ATLAS Collaboration CERN |
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| Total Pages | : 0 |
| Release | : 2022 |
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Download Measurements of Higgs Boson Production by Gluon−gluon Fusion and Vector-boson Fusion Using H->WW∗->e[nu][mu][nu]) Decays in Pp Collisions at [square Root]s Book in PDF, Epub and Kindle
| Author | : David Richard Shope |
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| Total Pages | : 159 |
| Release | : 2019 |
| Genre | : Higgs bosons |
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Download Measurement of GgF and VBF Higgs Boson Production Cross-sections in the H->WW*->evmv Decay Channel from Pp Collisions Collected with the ATLAS Detector at the LHC Book in PDF, Epub and Kindle
