Z-boson production via the weak process e+e−→μ+μ− in the ... A measurement of the production cross-section for Z bosons that decay to muons is presented. 95 % confidence level upper limits range from 0.53 pb at mH = 195 GeV to 0.008 pb at mH = 950 GeV for the gluon-fusion produc-tion mode and from 0.31 pb at mH = 195 GeV to 0.009 pb at mH = 950 GeV for the vector-boson-fusion production mode. A data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137 fb −1 − 1 is used. From 8 to 13 TeV, expected increase in the Higgs production cross section of a factor ~2 > First of all, we must make sure that we understand the physics observables, backgrounds, tau reconstruction, … > We can exploit the Z boson decays to a tau pair Well known electroweak process, with the same final state and the same mass scale of ~100 GeV A measurement of the production cross-section for Z bosons that decay to muons is presented. T… W=Z production cross sections W and Z boson production cross-section mea-surements in pp collisions are a test of the con-sistency of Standard-Model couplings, constrain proton parton distribution functions, and pro- Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. Example : Electron-Positron Scattering Near the Z0 Pole Cross section for the same process, mediated by a photon : ( Qf is the charge of f in units of e ) AU - Marchesini, Ivan. Stueckelberg Extensions The Z′ boson is sourced from couplings found in string theories with intersecting D-branes (see Stueckelberg action ). A Z-Boson is a force carrier that is made up of either one positron or one electron or two muons of opposite charge. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb−1. Dive into the research topics of 'Measurement of the Z boson differential production cross section using its invisible decay mode (Z → νν¯) in proton-proton collisions at √s = 13 TeV'. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb−1. OSTI.GOV Journal Article: Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton-proton collisions at $$\sqrt{s} . The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb−1. Z-parameter determination LEP was run at energy points on and around the Z mass (88-94 GeV) constituting an energy 'scan.' The shape of the cross-section variation around the Z peak can be New physics may contribute in the g… AU - Blekman, Freya. AU - De Clercq, Jarne Theo. '')at p s = 1.96 TeV, along with new measurements of W angular-decay distributions in p p collisions at p s =1.8TeV. The first is a search for Z di-boson production with a theoretical cross section of 1.4 pb. This dissertation presents a measurement of the W±Z production cross section and limits on anomalous triple gauge couplings in proton-proton collisions at a center of mass energy of 7 TeV using data produced by LHC collisions and acquired by the ATLAS detector in 2011. AU - Collaboration, CMS. Measurements of fiducial integrated and differential cross sections for inclusive W+, W− and Z boson production are reported. Kühn, A. Kwiatkowski. [70] a simple and natural method to define cross sections corresponding to vector bosons of definite polariza-tion has been proposed. For H→ττ both inclusive (solid line) and VBF (dashed line) mode are plotted. Studies using pseudo data samples corresponding to an integrated luminosity of the LHC Run 3 and high-luminosity HL-LHC show that the PDF . The data were recorded by the LHCb detector during pp collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb −1.The cross-section is measured for muons in the pseudorapidity range 2.0 < η < 4.5 with transverse momenta p T > 20 GeV/c. We present the cross section for production of a Z boson in association with four jets at the Large Hadron Collider, at next-to-leading order in the QCD coupling. = decay rate The cross section : Because : the above correction is negligible outside Z0 pole. The production of Z bosons in pPb collisions at s NN = 5.02 TeV is studied by the CMS experiment via the electron and muon decay channels. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb − 1 ^{-1} − 1. Using a sample of 383487 decays collected during the 1996-1998 runs we measure the . Searches Direct searches for "wide resonance-width" models The following statements pertain only to "wide resonance width " models. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb ‒1 . T1 - Measurement of the Z boson differential production cross section using its invisible decay mode (Z → νν¯) in proton-proton collisions at √s = 13 TeV. Z ! Described by the exchange of a heavy Z0 boson Z0 couples to all types of fermion but there are no flavour-changing neutral currents! Abstract. AU - Bols, Emil Sørensen. Limits on the production cross section for 3 benchmark signals, a heavy scalar, a spin-1 heavy vector triplet, and a spin-2 graviton are set in the mass range 300 GeV to 5000 GeV. In these . Suche nach dem Higgs-Boson in hadronischen Endzuständen mit fehlender Energie am L3-Experiment bei LEP: This thesis presents searches for the Higgs boson, which Differential Higgs boson (H) production cross sections are sensitive probes for physics beyond the standard model. The production cross-sections for W^{± } and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb^{-1} collected at a centre-of-mass energy √{s}=2.76 TeV. The total cross section is evaluated for pZ T larger than 0, 40, 80, and 120GeV. In these measurements, events are selected containing an imbalance in transverse . (Submitted on 21 Mar 1995) Abstract: QCD corrections to the electron positron annihilation cross-section into hadrons and to the hadronic boson decay rate are reviewed. standard lineshape parameter lep experiment z-to-fermion coupling ep collision polarized electron beam z-boson resonance cross-section formula anomalous coupling decay mode neutral lepton special technique structure function axial-vector coupling constant partial decay width production cross section high-statistics study decay property . = decay rate The cross section : Because : the above correction is negligible outside Z0 pole. The results are combined with a previous measurement of charged-lepton decays of the Z boson. In these measurements, events are selected containing an imbalance in transverse . its on the production cross-section of a heavy Higgs boson times the branching ratio to Z boson pairs. Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. The cross section is computed in a fiducial phase space defined at parton level requiring all parton transverse momenta $p_\mathrm{T} \gt$ 10 GeV and at least The mass of the Higgs boson is set to 120 GeV. Using ¯h = 6.58 × 10−22 MeVs gives τ Z = 2.63×10−25 s. Formal developments are introduced in a form particularly suited for practical applications. The cross sections are reported integrated over a fiducial kinematic range, extrapolated to the full range, and also evaluated differentially as a function of the W decay lepton pseudorapidity and the Z boson . A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Zγjj) in proton-proton collisions. The fiducial differential cross section is measured as a function of the Z boson transverse momentum. - The hadronic cross section at the Z pole This thesis describes a measurement of the production cross section and forward-backward charge asymmetry of the process rm e^{+}e^ {-}totau^{+}tau ^{-}(gamma) at center-of -mass energies around the Z^circ resonance (88 GeV to 94 GeV). Writing the partial widths as etc., the total cross section can be written (2) where f is the final state fermion flavour: and (The relation to the non-relativistic form of the part II course is given in the appendix) . The emphasis is given to the PDF analysis of the Z boson polarisation data which provide additional constraint to the gluon distribution for Bjorken x below 0.1. M. Trovatelli DIS2018, Kobe 16-20 Apr 2018 4 Higgs boson cross-section measurements In Run-2 different Higgs boson cross-section measurements considered: • Inclusive fiducial and differential cross-section • Measured in fiducial volume - Avoid model-dependent extrapolations → only correct for inefficiencies & reconstruction effects From 8 to 13 TeV, expected increase in the Higgs production cross section of a factor ~2 > First of all, we must make sure that we understand the physics observables, backgrounds, tau reconstruction, … > We can exploit the Z boson decays to a tau pair Well known electroweak process, with the same final state and the same mass scale of ~100 GeV Right hand plot shows the total cross sections for Ecm = 7, 8 and 14 TeV. In nuclear β decay use "matrix elements", . Figure 3: Standard Model Higgs boson production cross section times branching ratio at Ecm= 8 TeV. ref. The measured total fiducial cross section for events with Z boson transverse momentum greater than 200 GeV is 3000−170+180 fb. The production cross sections of the inclusive Drell-Yan processes W ± →ν and Z/γ∗→(=e, μ) are measured in proton-proton collisions at √s=7TeV with the ATLAS detector. Gan L12: Z Boson and Higgs 3 The Standard Model predicts the following cross section: Γ Z is the "total width" of the Z: sum of all the partial widths listed on the previous page. The Z′ boson are the excited modes of a neutral bulk gauge symmetry. The production cross-sections for W ± and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb - 1 collected at a centre-of-mass energy s=2.76 TeV. The decay channels W → ℓ ν and Z → ℓ ℓ are used, where ℓ can be an electron or a muon. The standard model predicts the cross section for the Higgs boson production as well as the decay rates very precisely. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996-1998. AU - Lontkovskyi, Denys. These and other measurements made by the L_3 collaboration on production and decay of the Z^circ boson have been used to determine precisely parameters of the . Formal developments are introduced in a form particularly suited for practical applications. The observation of W and Z bosons in the tau decay channel is also . Bottom-left panel: fractional experimental uncertainties in W + 1 jet analysis in 1.96 TeV p p ¯ collisions at the Tevatron as a function of the leading . Hence the vertex factor for the Z boson is: Using the experimentally determined value of the weak mixing angle: Fermion Prof. M.A. A search for decays of the Higgs and Z boson to pairs of J/ψ or Y(nS) (n = 1, 2, 3) mesons, with their subsequent decay to μ+μ− pairs, is presented. Z bosons are reconstructed in the e+e and + decay modes. This method has been applied to study the polarization of W and Z bosons in vector-boson scattering at LO [70-72] and in di-boson production at NLO QCD [73,74] with purely leptonic final states . Can write the total cross section in terms of the Z boson decay rates (partial widths) from page 473 (question 26) !! In these measurements, events are selected containing an imbalance in transverse . K.K. Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. 2 56.TheZ boson 56.1. We present a measurement of the left-right cross-section asymmetry (A LR) for Z boson production by e + e − collisions. When the neutral Z boson decays, it produces either a quark and the matching flavor of antiquark or a lepton and the matching flavor or anti-lepton. It must obey the conservation laws to maintain neutrality (Bohm & Harshman, 2000). Therefore this validate our assumption that there are only three kinds of neutrinos that the Z-boson can decay into. If one assumes universal Z-boson couplings to charged leptons, Rℓ = 20.767±0.025. The analysis exploits the [Formula: see text] decay in data corresponding to an integrated luminosity of 19.7[Formula: see text] collected by the CMS e … • Total cross-sections: σ . Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. The inclusive cross section is compared to pp collision predictions, and found to scale with the number of elementary nucleon-nucleon collisions. Authors: K.G. 1. 1 When the Z decays to neutrinos, this process is a key irreducible background to many searches for new They are based on 25.0 ± 0.5 pb−1 of pp collision data at √s = 5.02 TeV collected with the ATLAS detector at the CERN Large Hadron Collider. 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z boson decay cross section

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Abstract This work presents the measurement of the Z boson differential cross section in transverse momentum (pZ T), in the electron-positron decay channel, using the ATLAS detector at the LHC. In these measurements, events are selected containing an imbalance in transverse . Z-boson production via the weak process e+e−→μ+μ− in the ... A measurement of the production cross-section for Z bosons that decay to muons is presented. 95 % confidence level upper limits range from 0.53 pb at mH = 195 GeV to 0.008 pb at mH = 950 GeV for the gluon-fusion produc-tion mode and from 0.31 pb at mH = 195 GeV to 0.009 pb at mH = 950 GeV for the vector-boson-fusion production mode. A data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137 fb −1 − 1 is used. From 8 to 13 TeV, expected increase in the Higgs production cross section of a factor ~2 > First of all, we must make sure that we understand the physics observables, backgrounds, tau reconstruction, … > We can exploit the Z boson decays to a tau pair Well known electroweak process, with the same final state and the same mass scale of ~100 GeV A measurement of the production cross-section for Z bosons that decay to muons is presented. T… W=Z production cross sections W and Z boson production cross-section mea-surements in pp collisions are a test of the con-sistency of Standard-Model couplings, constrain proton parton distribution functions, and pro- Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. Example : Electron-Positron Scattering Near the Z0 Pole Cross section for the same process, mediated by a photon : ( Qf is the charge of f in units of e ) AU - Marchesini, Ivan. Stueckelberg Extensions The Z′ boson is sourced from couplings found in string theories with intersecting D-branes (see Stueckelberg action ). A Z-Boson is a force carrier that is made up of either one positron or one electron or two muons of opposite charge. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb−1. Dive into the research topics of 'Measurement of the Z boson differential production cross section using its invisible decay mode (Z → νν¯) in proton-proton collisions at √s = 13 TeV'. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb−1. OSTI.GOV Journal Article: Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton-proton collisions at $$\sqrt{s} . The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb−1. Z-parameter determination LEP was run at energy points on and around the Z mass (88-94 GeV) constituting an energy 'scan.' The shape of the cross-section variation around the Z peak can be New physics may contribute in the g… AU - Blekman, Freya. AU - De Clercq, Jarne Theo. '')at p s = 1.96 TeV, along with new measurements of W angular-decay distributions in p p collisions at p s =1.8TeV. The first is a search for Z di-boson production with a theoretical cross section of 1.4 pb. This dissertation presents a measurement of the W±Z production cross section and limits on anomalous triple gauge couplings in proton-proton collisions at a center of mass energy of 7 TeV using data produced by LHC collisions and acquired by the ATLAS detector in 2011. AU - Collaboration, CMS. Measurements of fiducial integrated and differential cross sections for inclusive W+, W− and Z boson production are reported. Kühn, A. Kwiatkowski. [70] a simple and natural method to define cross sections corresponding to vector bosons of definite polariza-tion has been proposed. For H→ττ both inclusive (solid line) and VBF (dashed line) mode are plotted. Studies using pseudo data samples corresponding to an integrated luminosity of the LHC Run 3 and high-luminosity HL-LHC show that the PDF . The data were recorded by the LHCb detector during pp collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb −1.The cross-section is measured for muons in the pseudorapidity range 2.0 < η < 4.5 with transverse momenta p T > 20 GeV/c. We present the cross section for production of a Z boson in association with four jets at the Large Hadron Collider, at next-to-leading order in the QCD coupling. = decay rate The cross section : Because : the above correction is negligible outside Z0 pole. The production of Z bosons in pPb collisions at s NN = 5.02 TeV is studied by the CMS experiment via the electron and muon decay channels. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb − 1 ^{-1} − 1. Using a sample of 383487 decays collected during the 1996-1998 runs we measure the . Searches Direct searches for "wide resonance-width" models The following statements pertain only to "wide resonance width " models. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb ‒1 . T1 - Measurement of the Z boson differential production cross section using its invisible decay mode (Z → νν¯) in proton-proton collisions at √s = 13 TeV. Z ! Described by the exchange of a heavy Z0 boson Z0 couples to all types of fermion but there are no flavour-changing neutral currents! Abstract. AU - Bols, Emil Sørensen. Limits on the production cross section for 3 benchmark signals, a heavy scalar, a spin-1 heavy vector triplet, and a spin-2 graviton are set in the mass range 300 GeV to 5000 GeV. In these . Suche nach dem Higgs-Boson in hadronischen Endzuständen mit fehlender Energie am L3-Experiment bei LEP: This thesis presents searches for the Higgs boson, which Differential Higgs boson (H) production cross sections are sensitive probes for physics beyond the standard model. The production cross-sections for W^{± } and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb^{-1} collected at a centre-of-mass energy √{s}=2.76 TeV. The total cross section is evaluated for pZ T larger than 0, 40, 80, and 120GeV. In these measurements, events are selected containing an imbalance in transverse . (Submitted on 21 Mar 1995) Abstract: QCD corrections to the electron positron annihilation cross-section into hadrons and to the hadronic boson decay rate are reviewed. standard lineshape parameter lep experiment z-to-fermion coupling ep collision polarized electron beam z-boson resonance cross-section formula anomalous coupling decay mode neutral lepton special technique structure function axial-vector coupling constant partial decay width production cross section high-statistics study decay property . = decay rate The cross section : Because : the above correction is negligible outside Z0 pole. The results are combined with a previous measurement of charged-lepton decays of the Z boson. In these measurements, events are selected containing an imbalance in transverse . its on the production cross-section of a heavy Higgs boson times the branching ratio to Z boson pairs. Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. The cross section is computed in a fiducial phase space defined at parton level requiring all parton transverse momenta $p_\mathrm{T} \gt$ 10 GeV and at least The mass of the Higgs boson is set to 120 GeV. Using ¯h = 6.58 × 10−22 MeVs gives τ Z = 2.63×10−25 s. Formal developments are introduced in a form particularly suited for practical applications. The cross sections are reported integrated over a fiducial kinematic range, extrapolated to the full range, and also evaluated differentially as a function of the W decay lepton pseudorapidity and the Z boson . A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Zγjj) in proton-proton collisions. The fiducial differential cross section is measured as a function of the Z boson transverse momentum. - The hadronic cross section at the Z pole This thesis describes a measurement of the production cross section and forward-backward charge asymmetry of the process rm e^{+}e^ {-}totau^{+}tau ^{-}(gamma) at center-of -mass energies around the Z^circ resonance (88 GeV to 94 GeV). Writing the partial widths as etc., the total cross section can be written (2) where f is the final state fermion flavour: and (The relation to the non-relativistic form of the part II course is given in the appendix) . The emphasis is given to the PDF analysis of the Z boson polarisation data which provide additional constraint to the gluon distribution for Bjorken x below 0.1. M. Trovatelli DIS2018, Kobe 16-20 Apr 2018 4 Higgs boson cross-section measurements In Run-2 different Higgs boson cross-section measurements considered: • Inclusive fiducial and differential cross-section • Measured in fiducial volume - Avoid model-dependent extrapolations → only correct for inefficiencies & reconstruction effects From 8 to 13 TeV, expected increase in the Higgs production cross section of a factor ~2 > First of all, we must make sure that we understand the physics observables, backgrounds, tau reconstruction, … > We can exploit the Z boson decays to a tau pair Well known electroweak process, with the same final state and the same mass scale of ~100 GeV Right hand plot shows the total cross sections for Ecm = 7, 8 and 14 TeV. In nuclear β decay use "matrix elements", . Figure 3: Standard Model Higgs boson production cross section times branching ratio at Ecm= 8 TeV. ref. The measured total fiducial cross section for events with Z boson transverse momentum greater than 200 GeV is 3000−170+180 fb. The production cross sections of the inclusive Drell-Yan processes W ± →ν and Z/γ∗→(=e, μ) are measured in proton-proton collisions at √s=7TeV with the ATLAS detector. Gan L12: Z Boson and Higgs 3 The Standard Model predicts the following cross section: Γ Z is the "total width" of the Z: sum of all the partial widths listed on the previous page. The Z′ boson are the excited modes of a neutral bulk gauge symmetry. The production cross-sections for W ± and Z bosons are measured using ATLAS data corresponding to an integrated luminosity of 4.0 pb - 1 collected at a centre-of-mass energy s=2.76 TeV. The decay channels W → ℓ ν and Z → ℓ ℓ are used, where ℓ can be an electron or a muon. The standard model predicts the cross section for the Higgs boson production as well as the decay rates very precisely. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996-1998. AU - Lontkovskyi, Denys. These and other measurements made by the L_3 collaboration on production and decay of the Z^circ boson have been used to determine precisely parameters of the . Formal developments are introduced in a form particularly suited for practical applications. The observation of W and Z bosons in the tau decay channel is also . Bottom-left panel: fractional experimental uncertainties in W + 1 jet analysis in 1.96 TeV p p ¯ collisions at the Tevatron as a function of the leading . Hence the vertex factor for the Z boson is: Using the experimentally determined value of the weak mixing angle: Fermion Prof. M.A. A search for decays of the Higgs and Z boson to pairs of J/ψ or Y(nS) (n = 1, 2, 3) mesons, with their subsequent decay to μ+μ− pairs, is presented. Z bosons are reconstructed in the e+e and + decay modes. This method has been applied to study the polarization of W and Z bosons in vector-boson scattering at LO [70-72] and in di-boson production at NLO QCD [73,74] with purely leptonic final states . Can write the total cross section in terms of the Z boson decay rates (partial widths) from page 473 (question 26) !! In these measurements, events are selected containing an imbalance in transverse . K.K. Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. 2 56.TheZ boson 56.1. We present a measurement of the left-right cross-section asymmetry (A LR) for Z boson production by e + e − collisions. When the neutral Z boson decays, it produces either a quark and the matching flavor of antiquark or a lepton and the matching flavor or anti-lepton. It must obey the conservation laws to maintain neutrality (Bohm & Harshman, 2000). Therefore this validate our assumption that there are only three kinds of neutrinos that the Z-boson can decay into. If one assumes universal Z-boson couplings to charged leptons, Rℓ = 20.767±0.025. The analysis exploits the [Formula: see text] decay in data corresponding to an integrated luminosity of 19.7[Formula: see text] collected by the CMS e … • Total cross-sections: σ . Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. The inclusive cross section is compared to pp collision predictions, and found to scale with the number of elementary nucleon-nucleon collisions. Authors: K.G. 1. 1 When the Z decays to neutrinos, this process is a key irreducible background to many searches for new They are based on 25.0 ± 0.5 pb−1 of pp collision data at √s = 5.02 TeV collected with the ATLAS detector at the CERN Large Hadron Collider. 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z boson decay cross section