Measurements Of The Mathrm Pp To W Gammagamma And Mathrm Pp To Z Gammagamma Cross Sections And Limits On Anomalous Quartic Gauge Couplings At Sqrts PDF Download
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| Release | : 2017 |
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Download 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} Book in PDF, ePub and Kindle
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.
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| Release | : 2012 |
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Download A Measurement of the Z Gamma Cross Section and Limits on Anomalous Triple Gauge Couplings at Square Root of S Book in PDF, ePub and Kindle
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
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| Release | : 2017 |
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Download Measurements of the Pp OWγγ and Pp OZγγ Cross Sections and Limits on Anomalous Quartic Gauge Couplings at √s Book in PDF, ePub and Kindle
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| Total Pages | : 7 |
| Release | : 2009 |
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Download Measurement of the Z Gamma ---] Nu Anti-nu Gamma Cross Section and Limits on Anomalous Z Z Gamma and Z Gamma Gamma Couplings in P Anti-p Collisions at S**1/2 Book in PDF, ePub and Kindle
We present the first observation of the Z[gamma] →[nu]{bar [nu]}[gamma] process at the Tevatron at 5.1 standard deviations significance, based on 3.6 fb−1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron p{bar p} Collider at √s = 1.96 TeV. The measured Z[gamma] cross section multiplied by the branching fraction of Z → {nu}{bar {nu}} is 32 ± 9(stat. + syst.) ± 2(lumi.) fb for the photon E{sub T} > 90 GeV. It is in agreement with the standard model prediction of 39 ± 4 fb. We set the most restrictive limits on anomalous trilinear Z[gamma][gamma] and ZZ[gamma] gauge boson couplings at a hadron collider to date, with three constraints being the world's strongest.
| Author | : Shruti Shrestha |
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| Release | : 2013 |
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Download A Measurement of Z(vv̄)[photon] Cross Section and Limits on Anomalous Triple Gauge Couplings at [square Root Of] Book in PDF, ePub and Kindle
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]
| Author | : Albert M. Sirunyan |
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| Release | : 2020 |
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Download Measurements of Pp→ZZ Production Cross Sections and Constraints on Anomalous Triple Gauge Couplings at √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
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| Total Pages | : 29 |
| Release | : 2016 |
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Download Measurement of the $W+̂W-̂$ Cross Section in Pp Collisions at $\sqrt{s}$ Book in PDF, ePub and Kindle
A measurement of the W boson pair production cross section in proton-proton collisions at √ s = 8 TeV is presented. The data we collected with the CMS detector at the LHC correspond to an integrated luminosity of 19.4 fb-1 . The W+W- candidates are selected from events with two charged leptons, electrons or muons, and large missing transverse energy. The measured W+W- cross section is 60.1 ± 0.9 (stat) ± 3.2 (exp) ± 3.1 (theo) ± 1.6 (lumi) pb = 60.1 ± 4.8 pb, consistent with the standard model prediction. The W+W-cross sections are also measured in two different fiducial phase space regions. In addition, the normalized differential cross section is measured as a function of kinematic variables of the final-state charged leptons and compared with several perturbative QCD predictions. Limits on anomalous gauge couplings associated with dimension-six operators are also given in the framework of an effective field theory. Finally, the corresponding 95% confidence level intervals are -5.7 csubWWW/sub/?sup2/sup 5.9 TeVsup-2/sup, -11.4 csubW/sub/?sup2/sup 5.4 TeVsup-2/sup , -29.2 csubB
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| Total Pages | : 3 |
| Release | : 1983 |
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Download Differential Cross Sections for [gamma] [gamma] → P P - in the C.m. Energy Range from 2.0 to 3.1 GeV Book in PDF, ePub and Kindle
| Author | : Teresa Barillari |
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| Total Pages | : 129 |
| Release | : 2001 |
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Download Cross Section Measurement of the Process [gamma Gamma->p Pbar] in Untagged Events at [sqrt](s) Book in PDF, ePub and Kindle
Le collisioneur LEP au CERN est utilisé pour étudier les collisions de deux photons quasi-réels e+e−->e+e−[gamma gamma]->e+e−X. L'échantillon de données pour la réaction e+e−->e+e−[gamma gamma]->e+e− [p pbar] a été collecté par le détecteur OPAL à une énergie dans le centre de masse de [sqrt](s)=183 et 189 GeV. Le processus [gamma gamma]->[p pbar] permet de tester les prédictions fournies par QED et QCD. Les mesures de section efficace obtenues par OPAL couvrent une région du centre de masse de deux photons, "W", entre 2.15 GeV"W"3.95 GeV et l'angle polaire dans le centre de masse du système [gamma gamma]-[p pbar] est restreint à I(cos theta*)I
