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A Measurement Of Z Boson Production And Rapidity Distribution In Proton Antiproton Collisions At Square Root Of S
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Book Synopsis A Measurement of Z Boson Production and Rapidity Distribution in Proton-antiproton Collisions at [square Root of S] by : Aidan Robson
Download or read book A Measurement of Z Boson Production and Rapidity Distribution in Proton-antiproton Collisions at [square Root of S] written by Aidan Robson and published by . This book was released on 2004 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Measurement of Z Boson Production and Rapidity Distribution in Proton-Antiproton Collisions at {u221A}s by :
Download or read book A Measurement of Z Boson Production and Rapidity Distribution in Proton-Antiproton Collisions at {u221A}s written by and published by . This book was released on 2004 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-precision measurements are made of Z boson production in proton-antiproton collisions at √s = 1.96 TeV recorded by the Collider Detector at Fermilab, using the electron decay channel. The cross-section times branching ratio is measured to be ?Z · Br(Z → e+e-) = (255.7 ± 2.4stat ± 5.2sys ± 15.2lum)pb in a dataset of 194 pb-1 collected between March 2002 and June 2003. This agrees well with theoretical predictions. The cross-section for W boson production in the electron channel has also been measured in the subset of this dataset of 72 pb-1 collected up until January 2003. Using this smaller dataset the ratio of cross-sections is determined to be R ≡ ?W · Br(W → e?)/?Z · Br(Z → ee) = 10.82 ± 0.18stat ± 0.16sys. Combining these results with measurements made in the muon channel gives R = 10.92 ± 0.15stat ± 0.14sys (e + ? channels), from which the branching ratio of the W to electrons and muons, and the total width of the W, have been extracted: Br(W → l?) = 0.1089 ± 0.0022 (l = e,?); ?(W) = 2078.8 ± 41.4 MeV, which are in good agreement with the Standard Model values and with other measurements. The CKM quark mixing matrix element.
Book Synopsis A Measurement of Z Boson Production and Rapidity Distribution in P - Anti-p Collisions at S**1/2 by :
Download or read book A Measurement of Z Boson Production and Rapidity Distribution in P - Anti-p Collisions at S**1/2 written by and published by . This book was released on 2005 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Z Boson Transverse Momentum in Proton-antiproton Collisions at Sqrt(s) by :
Download or read book Measurement of Z Boson Transverse Momentum in Proton-antiproton Collisions at Sqrt(s) written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Width of the W Boson in Proton-antiproton Collisions at (the Square Root Of) S by : Jie Yang
Download or read book Measurement of the Width of the W Boson in Proton-antiproton Collisions at (the Square Root Of) S written by Jie Yang and published by . This book was released on 1995 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the W Boson Mass in Proton-antiproton Collisions at [square Root Of]s by : Qiang Zhu
Download or read book Measurement of the W Boson Mass in Proton-antiproton Collisions at [square Root Of]s written by Qiang Zhu and published by . This book was released on 1994 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Differential Angular Distribution of the W Boson Produced in Association with Jets in Proton-antiproton Collisions at Squareroot (s) by :
Download or read book Measurement of the Differential Angular Distribution of the W Boson Produced in Association with Jets in Proton-antiproton Collisions at Squareroot (s) written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for the Production of ZW and ZZ Boson Pairs Decaying Into Charged Leptons and Jets in Proton-antiproton Collisions at Sqrt[s] by :
Download or read book Search for the Production of ZW and ZZ Boson Pairs Decaying Into Charged Leptons and Jets in Proton-antiproton Collisions at Sqrt[s] written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the production cross section for ZW and ZZ boson pairs in final states with a pair of charged leptons, from the decay of a Z boson, and at least two jets, from the decay of a W or Z boson, using the full sample of proton-antiproton collisions recorded with the CDF II detector at the Tevatron, corresponding to 8.9 fb(̂-1) of integrated luminosity. We increase the sensitivity to vector boson decays into pairs of quarks using a neural network discriminant that exploits the differences between the spatial spread of energy depositions and charged-particle momenta contained within the jet of particles originating from quarks and gluons. Additionally, we employ new jet energy corrections to Monte Carlo simulations that account for differences in the observed energy scales for quark and gluon jets. The number of signal events is extracted through a simultaneous fit to the dijet mass spectrum in three classes of events: events likely to contain jets with a heavy-quark decay, events likely to contain jets originating from light quarks, and events that fail these identification criteria. We determine the production cross section to be 2.5 +2.0 -1.0 pb (
Book Synopsis Measurement of Z-boson Production in Pb+Pb and P+p Collisions Via the Electron and Muon Decay Channels at [squareroot]s(NN) by : Michael David Gardner
Download or read book Measurement of Z-boson Production in Pb+Pb and P+p Collisions Via the Electron and Muon Decay Channels at [squareroot]s(NN) written by Michael David Gardner and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments over the last decade at the Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory have yielded evidence for the formation of the new state of matter called the quark-gluon plasma (QGP). Normally, quarks (and their associated gluons) are found only in colorless doublets (mesons) or triplets (baryons), but when raised above the cross-over threshold at a temperature of ∼ 175 MeV, a strongly-coupled partonic medium of asymptotically free quarks and gluons is expected to form. The focus of heavy-ion physics at both the RHIC and Large Hadron Collider (LHC) experiments has been to study physical processes that allow for a better grasp of the properties of this medium. Because of the large center-of-mass energy per nucleon pair ([squareroot]s(NN)) of 2.76 TeV in Pb+Pb collisions at the LHC and substantial delivered integrated luminosities, the study of new processes in nucleus-nucleus collisions has become possible. One of those processes is Z-boson production, which due to it not interacting strongly, being produced in hard collisions and having a decay channel that does not interact with the QGP, can act as a control in understanding the cold nuclear matter effects present in heavy-ion collisions. This dissertation presents the measurement of the production of Z bosons in the dimuon and dielectron decay channels in Pb+Pb and p+p collisions at [squareroot]s(NN) of 2.76 TeV obtained by the CMS experiment at the LHC. The analysis is based on the data sample collected during the Pb+Pb run in 2011, which corresponds to an integrated luminosity of 150 [mu]b−1 and on the p+p data sample collected in 2013, at the same center-of-mass energy, with an integrated luminosity of 5.4 pb−1. The ratio of Pb+Pb to p+p yields, scaled by the number of incoherent nucleon-nucleon collisions, R(AA), is expected to be equal to unity if there are no nuclear effects modifying the production of the Z boson in the Pb+Pb collisions. The R(AA) for centrality-integrated Z-boson production is found to be 1.06 ± 0.05 (stat) ± 0.08 (syst) in the dimuon channel and 1.02 ± 0.08 (stat) ± 0.15 (syst) in the dielectron channel, and shows no nuclear modification across the rapidity, transverse momentum and centrality bins measured. This result demonstrates that the binary-collision scaling is seen to hold in the kinematic region studied, which is expected for a colorless probe that is unaffected by a deconfined QGP. It also opens avenues to study processes that are strongly modified by the QGP, by using Z production as a control.
Book Synopsis Measurement of Associated Z Boson and Charm Quark Production in Proton-proton Collisions at Square Root of S Equals to 13 TeV by : Luis Pinto Cabrera
Download or read book Measurement of Associated Z Boson and Charm Quark Production in Proton-proton Collisions at Square Root of S Equals to 13 TeV written by Luis Pinto Cabrera and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents the measurements of the differential production cross-sections of a Z boson in association with at least one charm-quark-initiated jet, where the Z boson decays leptonically into a muon-antimuon pair. Data recorded in proton-proton collisions by the ATLAS detector at the Large Hadron Collider (LHC) during the years of 2015 to 2018 is utilised, when the LHC was running at a center of mass energy of 13 TeV. The studied data corresponds to a total integrated luminosity of 139 fb^-1. The measurements are compared to simulated data produced at next-to-leading-order and normalized to theoretical predictions at next-to-next-leading order. The results show that predictions underestimate the total number of events by 50% but display a good modelling of all distribution shapes of the chosen observables in data. The discrepancy can be attributed to a problem in the normalisation but further studies need to be made to settle the issue"--
Book Synopsis Measurement of the Mass and Width of the Z Boson from Z Going to Positron-electron Decay in Antiproton-proton Collisions at Sqrt.s by : Hovhannes Keutelian
Download or read book Measurement of the Mass and Width of the Z Boson from Z Going to Positron-electron Decay in Antiproton-proton Collisions at Sqrt.s written by Hovhannes Keutelian and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I report the results of an analysis 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.) $pm$ 0.2(scale) GeV/c$sp2$ and a width of $Gammasb{rm Z}$ = 2.8 $pm$ 1.0(stat.) $pm$ 0.5(syst.) GeV.
Book Synopsis Measurement of the Differential Angular Distribution of the W Boson Produced in Association with Jets in Proton-antiproton Collisions at Sqrt(s) by : John Strologas
Download or read book Measurement of the Differential Angular Distribution of the W Boson Produced in Association with Jets in Proton-antiproton Collisions at Sqrt(s) written by John Strologas and published by . This book was released on 2002 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 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 by : Alexander Andriatis
Download or read book 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 written by Alexander Andriatis and published by . This book was released on 2018 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis A Measurement of W+/-Z Production in Proton-proton Collisions at Sqrt(s) by : Stephen Cole (Physicist)
Download or read book A Measurement of W+/-Z Production in Proton-proton Collisions at Sqrt(s) written by Stephen Cole (Physicist) and published by . This book was released on 2015 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents measurements of W+/-Z production in ATLAS data collected in 2011 for pp collisions at a center-of-mass energy of 7 TeV and the combination of ATLAS and CMS data for the extraction of ZZ anomalous triple gauge coupling 95% confidence intervals. Confidence intervals for anomalous triple gauge boson couplings are derived using the transverse momentum distribution of Z bosons. These values agree well with the standard model expectation. The extraction of ZZ anomalous triple gauge coupling 95% confidence intervals used 4.6 fb-1 of 7 TeV data recorded by ATLAS and 5.0 fb-1 of 7 TeV data recorded by CMS. This is the first combined measurement of the ZZ anomalous triple gauge couplings between ATLAS and CMS. (Abstract shortened by UMI.).
Book Synopsis Measurement of Photon-charm Production of [proton-antiproton] Collisions at [square-root] S by : Rowan T. Hamilton
Download or read book Measurement of Photon-charm Production of [proton-antiproton] Collisions at [square-root] S written by Rowan T. Hamilton and published by . This book was released on 1996 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Z --] [tau] [tau] Production Cross-section in Proton-proton Collisions at [square Root Of] S by : Justin Griffiths
Download or read book Measurement of the Z --] [tau] [tau] Production Cross-section in Proton-proton Collisions at [square Root Of] S written by Justin Griffiths and published by . This book was released on 2012 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first measurement of the inclusive cross-section of the Z boson decaying to two tau leptons was measured with the ATLAS detector at the LHC. The data sample in this analysis represents an integrated luminosity of 35 pb ̄1 of proton-proton collisions at a center of mass energy of sqrt(s)=7 TeV. Separate measurements were performed in four decay modes based on how the two tau leptons decay: to hadrons and an electron, to hadrons and a muon, to an electron and a muon, and to two muons. In all four final states, inclusive cross-section measurements were made both in the fiducial region of the ATLAS detector where acceptance is high and in the full phase space, restricted to the mass range of [66, 116] GeV. The measurements from the four individual channels were then combined to yield the combined Z --> [tau] [tau] cross-section of 970 ± 70 (stat.) ± 60 (sys.) ± 30 (lumi.) pb.
Book Synopsis Measurement of the Transverse Momentum Distribution of Z Bosons in Proton-proton Collisions at Sqrt(s) by : Klemens Müller
Download or read book Measurement of the Transverse Momentum Distribution of Z Bosons in Proton-proton Collisions at Sqrt(s) written by Klemens Müller and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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