A Measurement Of The Z Gamma Cross Section And Limits On Anomalous Triple Gauge Couplings At Square Root Of S
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A Measurement Of The Z Gamma Cross Section And Limits On Anomalous Triple Gauge Couplings At Square Root Of S
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Author :
language : en
Publisher:
Release Date : 2012
A Measurement Of The Z Gamma Cross Section And Limits On Anomalous Triple Gauge Couplings At Square Root Of 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.
A study of the properties of the Z$\gamma$ diboson system is presented using 5.0 fb$^{-1}$ of proton-proton collision data from the LHC using the CMS detector. The pp $\rightarrow Z(\rightarrow\mu \mu) \gamma$ and pp $\rightarrow Z(\rightarrow e e) \gamma$ production cross sections are measured within the fiducial volume of CMS with a combined measurement of $\sigma_{\ell\ell\gamma} = 5.33 \pm 0.08 ~\text{(stat.)} \pm 0.25 ~\text{(syst.)} \pm 0.12 ~\text{(lumi.)}$ pb that is in good agreement with Standard Model predictions. Upper limits on the neutral anomalous triple gauge couplings set are the most stringent limits on these couplings to date, with allowed regions: $-0.010
Physics With Electrons In The Atlas Detector
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Author : Kurt Brendlinger
language : en
Publisher: Springer
Release Date : 2018-01-30
Physics With Electrons In The Atlas Detector written by Kurt Brendlinger and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-30 with Science categories.
This thesis presents two production cross-section measurements of pairs of massive bosons using final states with leptons, made with the ATLAS detector at the Large Hadron Collider. The first measurement, performed using data collected in 2012 at center-of-mass energy √ s = 8 TeV, is the first fiducial and differential cross-section measurement of the production of the Higgs Boson when it decays to four charged leptons (electrons or muons). The second measurement is the first fiducial and inclusive production cross-section measurement of WZ pairs at center-of-mass energy √ s = 13 TeV using final states with three charged leptons. A significant portion of the thesis focuses on the methods used to identify electrons from massive boson decay—important for many flagship measurements—and on assessing the efficiency of these particle identification techniques. The chapter discussing the WZ pair cross-section measurement provides a detailed example of an estimate of lepton background in the context of an analysis with three leptons in the final state.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1995
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Measurements Of Zz Production Cross Section Using Four Lepton Events And Constraints On Anomalous Triple Gauge Couplings At Squareroot S
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Author : Usama Hussain
language : en
Publisher:
Release Date : 2020
Measurements Of Zz Production Cross Section Using Four Lepton Events And Constraints On Anomalous Triple Gauge Couplings At Squareroot S written by Usama Hussain and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Studies of four-lepton production in proton-proton collisions, pp → (Z/[gamma]*)(Z/[gamma]*)→ 4l, where l = e or [mu], using data collected during 2016-2018 (Run II) are presented. The dataset corresponds to an integrated luminosity of 137 fb^(−1) at a center-of-mass energy of 13 TeV, collected by the CMS detector at the LHC. All reported measurements use the 2l2l' final states, where l,l' = e or [mu]. The total ZZ cross section for all events with two Z bosons in the mass range 60-120 GeV is measured and found to be [sigma](pp → ZZ) = 17.2 ± 0.3 (stat) ± 0.5 (syst) ± 0.4 (theo) ± 0.3 (lumi) pb. Differentialcross sections are measured as functions of a number of kinematic observables. Allthese results agree with standard model predictions. Searches for anomalous triplegauge couplings are performed, and the four-lepton invariant mass distributions areused to set the most stringent limits to date on a number of parameters affectingneutral gauge boson interactionsl
Nuclear Data
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Author :
language : en
Publisher:
Release Date : 1996
Nuclear Data written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Nuclear physics categories.
Government Reports Announcements Index
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Author :
language : en
Publisher:
Release Date : 1993-05
Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-05 with Science categories.
A Measurement Of Z Vv Photon Cross Section And Limits On Anomalous Triple Gauge Couplings At Square Root Of
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Author : Shruti Shrestha
language : en
Publisher:
Release Date : 2013
A Measurement Of Z Vv Photon Cross Section And Limits On Anomalous Triple Gauge Couplings At Square Root Of written by Shruti Shrestha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
In this thesis, the first measurement of Z(vv̄)[photon] cross section in pp collisions at [square root of]s = 7 TeV has been done using data collected by the CMS detector. The measured cross section is 21.3 ± 4.2 (stat.) ± 4.3 (syst.) ± 0.5 (lumi.) fb. This measurement is based on the observations of events with missing transverse energy in excess of 130 GeV and photon in the rapidity range [eta]
Measurements Of The Mathrm Pp To W Gamma Gamma And Mathrm Pp To Z Gamma Gamma Cross Sections And Limits On Anomalous Quartic Gauge Couplings At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2017
Measurements Of The Mathrm Pp To W Gamma Gamma And Mathrm Pp To Z Gamma Gamma Cross Sections And Limits On Anomalous Quartic Gauge Couplings 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 2017 with categories.
Measurements are presented of $ \mathrm{ W \gamma\gamma } $ and $ \mathrm{ Z \gamma\gamma } $ production in proton-proton collisions. Fiducial cross sections are reported based on a data sample corresponding to an integrated luminosity of 19.4 fb$^{-1}$ collected with the CMS detector at a center-of-mass energy of 8 TeV. Signal is identified through the $\mathrm{ W } \to \ell\nu$ and $\mathrm{ Z }\to\ell\ell$ decay modes, where $\ell$ is a muon or an electron. The production of $ \mathrm{ W \gamma\gamma } $ and $ \mathrm{ Z \gamma\gamma } $, measured with significances of 2.6 and 5.9 standard deviations, respectively, is consistent with standard model predictions. In addition, limits on anomalous quartic gauge couplings in $ \mathrm{ W \gamma\gamma } $ production are determined in the context of a dimension-8 effective field theory.
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 Zz Production Cross Section And Limits On Anomalous Triple Gauge Couplings At S
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Author : Rachel Hinman
language : en
Publisher:
Release Date : 2012
Measurement Of The Zz Production Cross Section And Limits On Anomalous Triple Gauge Couplings At S written by Rachel Hinman 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.