Measurement Of The Inclusive W And Z Production Cross Sections In Pp Collisions At Sqrt S PDF Download
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| Release | : 2011 |
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Download Measurement of the Inclusive W and Z Production Cross Sections in Pp Collisions at $ \sqrt {s} Book in PDF, ePub and Kindle
A measurement of inclusive W and Z production cross sections in pp collisions at sqrt(s)=7 TeV is presented. The electron and muon decay channels are analyzed in a data sample collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 36 inverse picobarns. The measured inclusive cross sections are sigma(pp-> WX) B(W-> l nu) = 10.30 +/- 0.02 (stat.) +/- 0.10 (syst.) +/- 0.10 (th.) +/- 0.41 (lumi.) nb and sigma(pp -> ZX) B(Z-> l+̂l-̂) = 0.974 +/- 0.007 (stat.) +/- 0.007 (syst.) +/- 0.018 (th.) +/- 0.039 (lumi.) nb, limited to the dilepton invariant mass range 60 to 120 GeV. The luminosity-independent cross section ratios are [sigma(pp->WX) B(W-> l nu)]/[sigma(pp-> ZX) B(Z->l+̂l-̂)] = 10.54 +/- 0.07 (stat.) +/- 0.08 (syst.) +/- 0.16 (th.) and [sigma(pp->W+̂X) B(W+̂ -> l+̂nu)] / [sigma(pp->W-̂ X) B(W-̂ -> l-̂ nu)] = 1.421 +/- 0.006 (stat.) +/- 0.014 (syst.) +/- 0.029 (th.). The measured values agree with next-to-next-to-leading order QCD cross section calculations based on recent parton distribution functions.
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| Total Pages | : 38 |
| Release | : 2011 |
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Download Measurements of Inclusive W and Z Cross Sections in Pp Collisions at Sqrt(s) Book in PDF, ePub and Kindle
Measurements of inclusive W and Z boson production cross sections in pp collisions at sqrt(s)=7 TeV are presented, based on 2.9 inverse picobarns of data recorded by the CMS detector at the LHC. The measurements, performed in the electron and muon decay channels, are combined to give sigma(pp to WX) times B(W to muon or electron + neutrino) = 9.95 \pm 0.07(stat.) \pm 0.28(syst.) \pm 1.09(lumi.) nb and sigma(pp to ZX) times B(Z to oppositely charged muon or electron pairs) = 0.931 \pm 0.026(stat.) \pm 0.023(syst.) \pm 0.102(lumi.) nb. Theoretical predictions, calculated at the next-to-next-to-leading order in QCD using recent parton distribution functions, are in agreement with the measured cross sections. Ratios of cross sections, which incur an experimental systematic uncertainty of less than 4%, are also reported.
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| Total Pages | : 31 |
| Release | : 2014 |
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Download Measurement of Inclusive W and Z Boson Production Cross Sections in Pp Collisions at $\sqrt{s}$ Book in PDF, ePub and Kindle
| Author | : Stephanie Akemi Brandt |
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| Total Pages | : 160 |
| Release | : 2020 |
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Download Measurement of W and Z Boson Production Cross Sections in Proton-proton Collisions at [square Root] S Book in PDF, ePub and Kindle
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 299.1 ± 5 pb−1 ( [square root] s = 5.02TeV) and 199.3 ± 4 pb−1 ( [square root] s = 13TeV), with an average number of pile-up interactions [[mu] = 3 ([mu] = 2). Cross sections and cross section ratios are reported, with final states in electron and muon channels.
| Author | : Peter Matthew Grudberg |
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| Total Pages | : 400 |
| Release | : 1997 |
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Download Measurement of the W and Z Boson Production Cross Sections in P, P̄ Collisions at [square Root Sign]s Book in PDF, ePub and Kindle
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| Total Pages | : 45 |
| Release | : 2013 |
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Download Measurement of the W Gamma and Z Gamma Inclusive Cross Sections in Pp Collisions at $\sqrt{s}$ Book in PDF, ePub and Kindle
| Author | : Alexander Andriatis |
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| Total Pages | : 42 |
| Release | : 2018 |
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Download 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 Book in PDF, ePub and Kindle
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 decay products. The acceptance of the CMS detector of leptonic decays of W and Z bosons produced in pp colisions at [square root of]s = 5 TeV is calculated using Monte Carlo event simulation. Statistical and systematic uncertainties on the acceptance measurement from PDF and a, uncertainty and higher-order correction are reported. The use of the calculated acceptance in combination with measurements of detector efficiency, luminosity, and particle counting to determine the inclusive cross section is outlined. A total integrated luminosity of 331.64 pb-1 from 2015 and 2017 CMS data at [square root of]s = 5 TeV is available for the calculation of the inclusive cross section.
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| Total Pages | : 39 |
| Release | : 2014 |
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Download Measurement of the Production Cross Sections for a Z Boson and One Or More B Jets in Pp Collisions at Sqrt(s) Book in PDF, ePub and Kindle
The production of a Z boson, decaying into two leptons and produced in association with one or more b jets, is studied using proton-proton collisions delivered by the LHC at a centre-of-mass energy of 7 TeV. The data were recorded in 2011 with the CMS detector and correspond to an integrated luminosity of 5 fb-1. The Z(ll) + b-jets cross sections (where ll = [mu][mu] or ee) are measured separately for a Z boson produced with exactly one b jet and with at least two b jets. In addition, a cross section ratio is extracted for a Z boson produced with at least one b jet, relative to a Z boson produced with at least one jet. The measured cross sections are compared to various theoretical predictions, and the data favour the predictions in the five-flavour scheme, where b quarks are assumed massless. The kinematic properties of the reconstructed particles are compared with the predictions from the MadGraph event generator using the pythia parton shower simulation.
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| Total Pages | : 43 |
| Release | : 2013 |
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Download Measurement of the Inclusive $W\̂pm$ and Z/Gamma Cross Sections in the Electron and Muon Decay Channels in $Pp$ Collisions at $\sqrt{s} Book in PDF, ePub and Kindle
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Download Measurement of the Inclusive Upsilon Production Cross Section in Pp Collisions at Sqrt(s) Book in PDF, ePub and Kindle
The Upsilon production cross section in proton-proton collisions at sqrt(s) = 7 TeV is measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1 +/- 0.3 inverse picobarns. Integrated over the rapidity range.
