Download or read book Measurement of the P Anti p W Gamma X Cross Section 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 WW[gamma] triple gauge boson coupling parameters are studied using p{bar p} → l[nu][gamma] + X(l = e, [mu]) events at √s = 1.96 TeV. The data were collected with the D0 detector from an integrated luminosity of 162 pb−1 delivered by the Fermilab Tevatron Collider. The cross section times branching fraction for p{bar p} → W([gamma]) + X → l[nu][gamma] + X with E{sub T}{sup [gamma]} > 8 GeV and [Delta]R{sub {ell}{gamma}} > 0.7 is 14.8 ± 1.6(stat) ± 1.0(syst) ± 1.0(lum) pb. The one-dimensional 95% confidence level limits on anomalous couplings are -0.88

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 Collisionsat S 1 2 written by Andrew Warren Askew and published by . This book was released on 2004 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis details the measurement of the p{bar p} {yields} W{gamma} + X {yields} {mu}{nu}{gamma} + X cross section at {radical}s = 1.96 TeV using the D0 detector at Fermilab, in 134.5 pb{sup -1} of integrated luminosity. From the photon E{sub T} spectrum limits on anomalous couplings of the photon to the W are obtained. At 95% confidence level, limits of -1.05

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.

Download or read book Cross Section Measurement of the Process gamma Gamma p Pbar in Untagged Events at sqrt s written by Teresa Barillari and published by . This book was released on 2001 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book MEASUREMENT OF THE ANTI P P TOTAL CROSS SECTION AT SQUARE ROOT OF S written by N. A. Amos and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Inclusive Jet Cross Section in P Anti p Interactions at S 1 2 written by and published by . This book was released on 2005 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quasi free Cross Section Measurements at CLAS written by and published by . This book was released on 2014 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary measurements of the quasi-free differential cross sections of the gD -->pp-(p), gD --> K*(892)0L(p), and gD --> K+S*(1385)-(p) reactions are shown using data from the Jefferson Lab Hall B CLAS g13 experiment. No experimental cross section data have yet been published on gD --> K*(892)0L(p), and the only published cross section data on gD --> K+S*(1385)-(p) are at forward angles, where t-channel K+ and K*+ exchanges are predicted to dominate. These data can be used to contribute to the search for the "missing" N* resonances, some of which are predicted to have non-negligible couplings to the excited strangeness channels. These cross sections are shown to be sizable compared to the ground-state channels, indicating that it is important to include excited channels in coupled-channels analyses used to extract the N* resonances. In addition, the gD --> pp-(p) data provide a significant increase to the world statistics, and will be used to study rescattering effects within the deuteron.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976-03 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Measurement of Gamma C X and Gamma B X Production Cross Sections at S 1 2 written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The photon plus heavy-flavour quark (b, c) final state provides a unique and valuable window into both the sea quark content of the proton and the splitting of gluons into heavy-flavour quark pairs. A new combination of experimental techniques has provided the basis for the first measurements of the differential [gamma] + c + X and [gamma] + b + X production cross sections at √s = 1.96 TeV. The measurements use ≈ 1 fb−1 of data from p{bar p} collisions collected with the D0 detector.

Download or read book High Energy Physics Index written by and published by . This book was released on 1993 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the T Anti t Production Cross Section in P Anti p Collisions at S 1 2 written by Salvatore Rocco Rappoccio and published by . This book was released on 2005 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the measurement of the t{bar t} cross section in the lepton plus jets channel with {ge} 1 and {ge} 2 secondary vertex tags. We use the scalar sum of transverse energies of the event (H{sub T}) to discriminate t{bar t} from the other backgrounds. We also use the transverse mass of the leptonic W-boson (M{sub T}{sup W}) to further reduce the Non-W backgrounds. We use a combination of data and Monte Carlo to estimate the backgrounds from electroweak processes, single top, fake leptons, W+ Light Flavor fake tags, and real W+ Heavy Flavor production. We obtain a value of {sigma} {sub {ge}1} = 8.7{sub -0.9}{sup +0.9}(stat){sub -0.9}{sup +1.2}(sys) pb for the {ge}1 tag cross section, and {sigma}{sub {ge}2} = 8.7{sub -1.6}{sup +1.8}(stat){sub -1.3}{sup +1.9}(sys) pb for the {ge}2 tag cross section. The authors also present a measurement of the t{bar t} cross section by fitting the N{sub jet} spectrum. They combine the =1 and {ge}2 tag cross sections to obtain {sigma}{sub t{bar t}} = 8.9{sub -0.9}{sup +0.9}(stat){sub -1.3}{sup +1.4}(syst)pb.

Download or read book A Measurement of the P P Total Cross Section at Radical S written by and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The {bar p}p differential elastic scattering cross section was measured at √{bar s} = 1800 GeV, using an improved accelerator luminosity determination and CDF small angle data in the range of 0.05 ≤ t ≤ 0.2(GeV/c)2. By extrapolating the differential cross sections to t=0 and using the optical theorem we obtain a total cross section of [sigma]{sub tot}({bar p}p) = 72.0 {plus minus} 3.6 mb. This result is preliminary in the sense that we expect to further reduce the systematic error on the optical point. 9 refs., 8 figs.

Download or read book First Measurement of the T Anti t Differential Cross Section D Sigma dM t Anti t in P Anti p Collisions at S 1 2 written by and published by . This book was released on 2009 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the t{bar t} differential cross section with respect to the t{bar t} invariant mass, d[sigma]/dM{sub t{bar t}}, in p{bar p} collisions at √s = 1.96 TeV using an integrated luminosity of 2.7 fb−1 collected by the CDF II experiment. The t{bar t} invariant mass spectrum is sensitive to a variety of exotic particles decaying into t{bar t} pairs. The result is consistent with the standard model expectation, as modeled by PYTHIA with CTEQ5L parton distribution functions.

Download or read book Measurement of the Cross Section for Prompt Diphoton Production in P Anti p Collisions at S 1 2 written by and published by . This book was released on 2004 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cross section measurement of the process gamma gamma pp in untagged events at square root s written by Teresa Barillari and published by . This book was released on 2001 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the cross section for the reaction gamma p J yp gamma p J psi p with the ZEUS detector at HERA written by ZEUS Collaboration and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: