A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of P Bar P Collisions At Sqrt S
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A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of P Bar P Collisions At Sqrt S
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Author : Mika Vesterinen
language : en
Publisher:
Release Date : 2011
A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of P Bar P Collisions At Sqrt S written by Mika Vesterinen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Two analyses are performed with the large samples of dielectron and dimuon events collected by the D0 experiment at the Fermilab Tevatron $p\bar{p}$ collider. The dilepton transverse momentum ($p_T$) distribution in $Z/\gamma^* → \ell^+\ell^-$ production is a powerful probe of Quantum chromodynamics. Until now, this distribution has been measured with limited precision. An alternative variable, $\phi^*_\eta$, is proposed due to its relatively low susceptibility to detector effects. The $\phi^*_\eta$, distribution of events with $Z/\gamma^* → \ell^+\ell^-$ invariant masses between 70 and 110 GeV, is measured in three bins of dilepton rapidity. This measurement, with 7.3 fb$^{-1}$ of data, is significantly more precise than previous measurements of the $p_T$ distribution. A state-of-the-art QCD Monte Carlo program is in modest agreement with the data. Using 8.6 fb$^{-1}$ of data, the $ZZ/\gamma^* → \nu\bar{\nu}\ell^+\ell^-$ and $WZ/\gamma^* → \ell\nu\ell^+\ell^-$ processes are studied, yielding production cross sections of, $\sigma(p\bar{p} \rightarrow ZZ/\gamma^*)$ = 1.64 $\pm$ 0.46 p b and $\sigma(p\bar{p} \rightarrow WZ/\gamma^*)$ = 4.46 $\pm$ 0.64 pb, for $Z/\gamma^* → \ell^+\ell^-$ invariant masses between 60 and 130 GeV. These are in agreement with Standard Model predictions.
A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of Pp Collisions At S
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Author : Mika Vesterinen
language : en
Publisher:
Release Date : 2012
A Measurement Of The Z Boson Transverse Momentum Distribution And Of The Zz And Wz Production Cross Sections Using 7 3 8 6 Fb 1 Of Pp Collisions At S written by Mika Vesterinen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Measurement Of The Z Production Cross Section In Pp Collisions At 8 Tev And Search For Anomalous Triple Gauge Boson Couplings
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of The Z Production Cross Section In Pp Collisions At 8 Tev And Search For Anomalous Triple Gauge Boson Couplings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The cross section for the production of Z? in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb-1. Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. Furthermore, the differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. These observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. As a result, limits on anomalous triple gauge couplings of ZZ? and Z?? are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.
Measurement Of The W And Z Boson Production Cross Sections In P P Collisions At Square Root Sign S
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Author : Peter Matthew Grudberg
language : en
Publisher:
Release Date : 1997
Measurement Of The W And Z Boson Production Cross Sections In P P Collisions At Square Root Sign S written by Peter Matthew Grudberg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Measurement Of The Z Boson Differential Cross Section In Transverse Momentum And Rapidity In Proton Proton Collisions At 8 Tev
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of The Z Boson Differential Cross Section In Transverse Momentum And Rapidity In Proton Proton Collisions At 8 Tev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
We present a measurement of the Z boson differential cross section in rapidity and transverse momentum using a data sample of pp collision events at a centre-of-mass energy √s=8 TeV, corresponding to an integrated luminosity of 19.7 fb-1. The Z boson is identified via its decay to a pair of muons. The measurement provides a precision test of quantum chromodynamics over a large region of phase space. In addition, due to the small experimental uncertainties in the measurement the data has the potential to constrain the gluon parton distribution function in the kinematic regime important for Higgs boson production via gluon fusion. The results agree with the next-to-next-to-leading-order predictions computed with the fewz program. The results are also compared to the commonly used leading-order MadGraph and next-to-leading-order powheg generators.
Measurement Of The Wz Cross Section And Triple Gauge Couplings In P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2012
Measurement Of The Wz Cross Section And Triple Gauge Couplings In P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
This Letter describes the current most precise measurement of the WZ production cross section as well as limits on anomalous WWZ couplings at a center-of-mass energy of 1.96 TeV in proton-antiproton collisions. The WZ candidates are reconstructed from decays containing three charged leptons and missing energy from a neutrino, where the charged leptons are either electrons or muons. Using data collected by the CDF II detector (7.1 fb−1 of integrated luminosity), 64 candidate events are observed with the expected background contributing 8 ± 1 events. The measured total cross section?(p{bar p} → WZ) = 3.93{sub -0.53}{sup +0.60}(stat){sub -0.46}{sup +0.59}(syst) pb is in good agreement with the standard model prediction of 3.50 ± 0.21. The same sample is used to set limits on anomalous WWZ couplings.
Measurement Of The Production And Differential Cross Sections Of W W Bosons In Association With Jets In P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Measurement Of The Production And Differential Cross Sections Of W W Bosons In Association With Jets In P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
In this study, we present a measurement of the W-boson-pair production cross section in pp¯ collisions at 1.96 TeV center-of-mass energy and the first measurement of the differential cross section as a function of jet multiplicity and leading-jet energy. The W+W– cross section is measured in the final state comprising two charged leptons and neutrinos, where either charged lepton can be an electron or a muon. Using data collected by the CDF experiment corresponding to 9.7 fb–1 of integrated luminosity, a total of 3027 collision events consistent with W+W– production are observed with an estimated background contribution of 1790±190 events. The measured total cross section is ?(pp¯→W+W–) = 14.0 ± 0.6(stat)+1.2–1.0 (syst)±0.8 (lumi) pb, consistent with the standard model prediction.
Measurement Of The Wz Production Cross Section In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Measurement Of The Wz Production Cross Section In Pp Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
The WZ production cross section is measured by the CMS experiment at the CERN LHC in proton-proton collision data samples corresponding to integrated luminosities of 4.9 fb$^{-1}$ collected at $ \sqrt{s} = $ 7 TeV, and 19.6 fb$^{-1}$ at $ \sqrt{s} = $ 8 TeV. The measurements are performed using the fully-leptonic WZ decay modes with electrons and muons in the final state. The measured cross sections for 71 $
A Measurement Of The Wz And Zz Production Cross Sections Using Leptonic Final States In 8 6 Fb 1 Of P Bar P Collisions
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Author :
language : en
Publisher:
Release Date : 2012
A Measurement Of The Wz And Zz Production Cross Sections Using Leptonic Final States In 8 6 Fb 1 Of P Bar P Collisions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
We study the processes p{bar p} → WZ → l?ll− and p{bar p} → ZZ → l+l−?{bar {nu}}, where l = e or?. Using 8.6 fb−1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron collider, we measure the WZ production cross section to be 4.50{sub -0.66}{sup +0.63} pb which is consistent with, but slightly above a prediction of the standard model. The ZZ cross section is measured to be 1.64 ± 0.46 pb, in agreement with a prediction of the standard model. Combination with an earlier analysis of the ZZ → l+l−l+l− channel yields a ZZ cross section of 1.44{sub -0.34}{sup +0.35} pb.