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Study Of Z Gamma Events And Limits On Anomalous Z Z Gamma And Z Gamma Gamma Couplings In P Anti P Collisions At S1 2
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Book Synopsis Study of Z Gamma Events and Limits on Anomalous Z Z Gamma and Z Gamma Gamma Couplings in P Anti-p Collisions at S**1/2 by :
Download or read book Study of Z Gamma Events and Limits on Anomalous Z Z Gamma and Z Gamma Gamma Couplings in P Anti-p Collisions at S**1/2 written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of the Z[gamma] production cross section and limits on anomalous ZZ[gamma] and Z[gamma][gamma] couplings for form-factor scales of [Lambda] = 750 and 1000 GeV. The measurement is based on 138 (152) candidate events in the ee[gamma] ([mu][mu][gamma]) final state using 320 (290) pb−1 of p{bar p} collisions at √s = 1.96 TeV. The 95% C.L. limits on real and imaginary parts of individual anomalous couplings are
Book Synopsis Limits on the Anomalous ZZ[gamma] and Z[gamma][gamma] Couplings in P[anti P] Collisions At[radical] by :
Download or read book Limits on the Anomalous ZZ[gamma] and Z[gamma][gamma] Couplings in P[anti P] Collisions At[radical] written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors performed a direct search for the anomalous ZZ[gamma] and Z[gamma][gamma] couplings by studying p[anti p][yields][ell][ell][gamma]+ X, ([ell]= e, [mu]) events at[radical]s= 1.8 TeV with the D0 detector at the Fermilab Tevatron Collider. A fit to the transverse energy spectrum of the photon in the signal events, based on the data set corresponding to an integrated luminosity of 14.3 pb[sup[minus]1] (13.7 pb[sup[minus]1]) for the electron (muon) channel, yields the following 95% confidence level limits on the anomalous CP-conserving ZZ[gamma] couplings:[vert-bar]h[sub 30][sup Z][vert-bar]
Book Synopsis Z Gamma Production and Limits on Anomalous Z Z Gamma and Z Gamma Gamma Couplings in Panti-p Collisions at S**1/2 by :
Download or read book Z Gamma Production and Limits on Anomalous Z Z Gamma and Z Gamma Gamma Couplings in Panti-p Collisions at S**1/2 written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 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 by :
Download or read book 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 written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Limits on the Anomalous ZZ and Z Gamma Couplings in Panti P Collisions at Radicals by :
Download or read book Limits on the Anomalous ZZ and Z Gamma Couplings in Panti P Collisions at Radicals written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 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**ư by :
Download or read book 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**ư written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first observation of the Z? →?{bar?}? 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? 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?? and ZZ? gauge boson couplings at a hadron collider to date, with three constraints being the world's strongest.
Book Synopsis Limits on the Anomalous ZZ? and Z?? Couplings in P{anti P} Collisions at √s by :
Download or read book Limits on the Anomalous ZZ? and Z?? Couplings in P{anti P} Collisions at √s written by and published by . This book was released on 1995 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors performed a direct search for the anomalous ZZ? and Z?? couplings by studying p{anti p} → ll? + X, (l = e,?) events at √s = 1.8 TeV with the D0 detector at the Fermilab Tevatron Collider. A fit to the transverse energy spectrum of the photon in the signal events, based on the data set corresponding to an integrated luminosity of 14.3 pb−1 (13.7 pb−1) for the electron (muon) channel, yields the following 95% confidence level limits on the anomalous CP-conserving ZZ? couplings: {vert_bar}h30{sup Z}{vert_bar}
Book Synopsis Measurement of Z Gamma Production in Pbar{p} Collisions at Sqrt{s} by :
Download or read book Measurement of Z Gamma Production in Pbar{p} Collisions at Sqrt{s} written by and published by . This book was released on 2010 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production rate and kinematics of photons produced in association with Z bosons are studied using 2 fb−1 of p{bar p} collision data collected at the Collider Detector at Fermilab. The cross section for p{bar p} → ll−? + X (where the leptons l are either muons or electrons with dilepton mass M{sub l{ell}}> 40 GeV/c2, and where the photon has transverse energy E{sub T}{sup?}> 7 GeV and is well separated from the leptons) is 4.6 ± 0.2 (stat) ± 0.3 (syst) ± 0.3 (lum) pb, which is consistent with standard model expectations. We use the photon ET distribution from Z{gamma} events where the Z has decayed to?+?−, e+e−, or?{bar {nu}} to set limits on anomalous (non-standard-model) trilinear couplings between photons and Z bosons.
Book Synopsis Search for ZZ and Z\gamma^* Production in P-barp Collisions at Sqrt(s) by :
Download or read book Search for ZZ and Z\gamma^* Production in P-barp 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: The authors present a study of [mu][mu][mu][mu], eeee, and [mu][mu]ee events using 1 fb−1 of data collected with the D0 detector at the Fermilab Tevatron p{bar p} Collider at √s = 1.96 TeV. Requiring the lepton pair masses to be greater than 30 GeV, they observe one event, consistent with the expected background of 0.13 ± 0.03 events and with the predicted standard model ZZ and Z[gamma]* production of 1.71 ± 0.15 events. They set an upper limit on the ZZ and Z[gamma]* cross section of 4.4 pb at the 95% C.L. They also derive limits on anomalous neutral trilinear ZZZ and ZZ[gamma]* gauge couplings. The one-parameter 95% C.L. coupling limits with a form factor scale [Lambda] = 1.2 TeV are -0.28
Book Synopsis Measurement of the Z[gamma] Production Cross Section in Pp Collisions at 8 TeV and Search for Anomalous Triple Gauge Boson Couplings by :
Download or read book Measurement of the Z[gamma] Production Cross Section in Pp Collisions at 8 TeV and Search for Anomalous Triple Gauge Boson Couplings written by and published by . This book was released on 2015 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross section for the production of Z[gamma] 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. 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. The observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. Limits on anomalous triple gauge couplings of ZZ[gamma] and Z[gamma][gamma] are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.
Book Synopsis Search for Anomalous ZZ[gamma] and Z[gamma][gamma] Couplings with by :
Download or read book Search for Anomalous ZZ[gamma] and Z[gamma][gamma] Couplings with written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A direct test of the Standard Model by searching for anomalous ZZ[gamma] and Z[gamma][gamma] couplings is presented. The authors analyze p[bar p][yields] ll[gamma]+ X, (l= e, [mu]) events at[radical]s= 1.8 TeV with the D0d detector at the Fermilab Tevatron Collider. A fit to the transverse energy spectrum of the photon in the signal events, based on the data set corresponding to an integrated luminosity of 13.9 pb[sup[minus]1] (13.3 pb[sup[minus]1]) for the electron (muon) channel, yields the following 95% CL limits on the anomalous CP-conserving ZZ[gamma] couplings: -1.9
Book Synopsis Measurement of W-gamma and Z-gamma Production in Pp Collisions at Sqrt(s) by :
Download or read book Measurement of W-gamma and Z-gamma Production in Pp Collisions at Sqrt(s) written by and published by . This book was released on 2011 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A measurement of W-gamma and Z-gamma production in proton-proton collisions at sqrt(s) = 7 TeV is presented. Results are based on a data sample recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36 inverse picobarns. The electron and muon decay channels of the W and Z are used. The total cross sections are measured for photon transverse energy>10 GeV and spatial separation from charged leptons in the plane of pseudorapidity and azimuthal angle>0.7, and with an additional dilepton invariant mass requirement of> 50 GeV for the Z-gamma process. The following cross section times branching fraction values are found: sigma(pp to W-gamma+X) B(W to lepton neutrino) = 56.3 +/- 5.0 (stat.) +/- 5.0 (syst.) +/- 2.3 (lumi.) pb and sigma(pp to Z-gamma+X) B}(Z to lepton lepton) = 9.4 +/- 1.0 (stat.) +/- 0.6 (syst.) +/- 0.4 (lumi.) pb. These measurements are in agreement with standard model predictions. The first limits on anomalous WW gamma, ZZ gamma, and Z gamma gamma trilinear gauge couplings at sqrt(s) = 7 TeV are set.
Book Synopsis Projet de loi sur la creation d'un Institut national de prevoymas Au Congrés international d'Actuación de Berlin by :
Download or read book Projet de loi sur la creation d'un Institut national de prevoymas Au Congrés international d'Actuación de Berlin written by and published by . This book was released on 1906 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Exclusive Z Boson Production and Observation of High Mass P Anti-p ---] Gamma Gamma Anti-p ---] Pl+ L- Anti-p Events in P Anti-p Collisions at S**1/2 by :
Download or read book Search for Exclusive Z Boson Production and Observation of High Mass P Anti-p ---] Gamma Gamma Anti-p ---] Pl+ L- Anti-p Events in P Anti-p Collisions at S**1/2 written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a search for exclusive Z boson production in proton-antiproton collisions at √s = 1.96 TeV, using the CDF II detector at Fermilab. We observe no exclusive Z → l+l− candidates and place the first upper limit on the exclusive Z cross section in hadron collisions, [sigma]{sub excl}(Z) 0.96 pb at 95% confidence level. In addition, we observe eight candidate exclusive dilepton events from the quantum electrodynamic process p{bar p} → p[gamma][gamma]{bar p} → pl+l− {bar p}, and measure the cross section for M{sub l{ell}} 40 GeV=c2 and.
Book Synopsis Profil ou nouvelle description de la ville maritime port et havre de Dunquerque, au comté de Flandre by :
Download or read book Profil ou nouvelle description de la ville maritime port et havre de Dunquerque, au comté de Flandre written by and published by . This book was released on with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the W Gamma --] Mu Nu Gamma Cross-Section, Limits on Anomalous Trilinear Vector Boson Couplings, and the Radiation Amplitude Zero in P Anti-p Collisions at S**(1/2) by :
Download or read book Measurement of the W Gamma --] Mu Nu Gamma Cross-Section, Limits on Anomalous Trilinear Vector Boson Couplings, and the Radiation Amplitude Zero in P Anti-p Collisions at S**(1/2) written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract Not Provided.
Book Synopsis Limits on Anomalous Trilinear Gauge Couplings in $Z\gamma$ Events from $p\bar{p}$ Collisions at $\sqrt{s} by :
Download or read book Limits on Anomalous Trilinear Gauge Couplings in $Z\gamma$ Events from $p\bar{p}$ Collisions at $\sqrt{s} written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using Z[gamma] candidate events collected by the CDF detector at the Tevatron Collider, we search for potential anomalous (non-standard-model) couplings between the Z boson and the photon. At the hard scatter energies typical of the Tevatron, standard model Z[gamma] couplings are too weak to be detected by current experiments; hence any evidence of couplings indicates new physics. Measurements are performed using data corresponding to an integrated luminosity of 4.9 fb−1 in the Z → [nu]{bar {nu}} decay channel and 5.1 fb−1 in the Z → l+l− (l = [mu], e) decay channels. The combination of these measurements provides the most stringent limits to date on Z[gamma] trilinear gauge couplings. Using an energy scale of [Lambda] = 1.5 TeV to allow for a direct comparison with previous measurements, we find limits on the CP-conserving parameters that describe Z[gamma] couplings to be
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