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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 S1 2
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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 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) by : Andrew Warren Askew
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
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 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 Measurement of the P - Anti-p ---] W Gamma + X Cross Section at S**1/2 by :
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
Book Synopsis Measurement of the W? {u2192} ?v? Cross-Section, Limits on Anomalous Trilinear Vector Boson Couplings, and the Radiation Amplitude Zero in P$\bar{p}$ Collisions at {u221A}s by :
Download or read book Measurement of the W? {u2192} ?v? Cross-Section, Limits on Anomalous Trilinear Vector Boson Couplings, and the Radiation Amplitude Zero in P$\bar{p}$ Collisions at {u221A}s written by and published by . This book was released on 2004 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis details the measurement of the p$ar{p}$ → W? + X → ?v? + X cross section at √s = 1.96 TeV using the D0 detector at Fermilab, in 134.5 pb-1 of integrated luminosity. From the photon ET spectrum limits on anomalous couplings of the photon to the W are obtained. At 95% confidence level, limits of -1.05
Book Synopsis The Study of WGamma Production at D0 by :
Download or read book The Study of WGamma Production at D0 written by and published by . This book was released on 2007 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: W[gamma] production is analyzed in the electron and muon decay channels with approximately 1 fb−1 of data from p{bar p} collisions that were produced at a center-of-mass energy of √s = 1.96 TeV and that were collected by the D0 detector at the Fermilab Tevatron collider. The inclusive p{bar p} → l[nu][gamma] cross section is measured in both channels and is found to be consistent with the Standard Model expectation of 2.08 ± 0.05{sub PDF} pb for events with a photon E{sub T} > 11 GeV, [Delta]R{sub l{sub [gamma]}} > 0.7, and {ell}[nu][gamma] transverse mass greater than 90 GeV . The observed cross section is measured to be 2.05 ± 0.18{sub stat} ± 0.10{sub sys} ± 0.13{sub lumi} pb and a.72 ± 0.19{sub stat} ± 0.15{sub sys} ± 0.10{sub lumi} pb for the electron and muon channels respectively. The photon E{sub T} spectrum is examined for indications of anomalous WW{gamma} couplings. No evidence is found, and the following one-dimensional limits are set at a 95% confidence level: -0.18
Book Synopsis Measurement of the W + Gamma Production in Proton - Anti-proton Collisions at S**(1/2) by : Michael H. Kirby
Download or read book Measurement of the W + Gamma Production in Proton - Anti-proton Collisions at S**(1/2) written by Michael H. Kirby and published by . This book was released on 2004 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of the {bar p}p {yields} W{gamma} + X {yields} e{nu}{gamma} + X production cross section using data form the Collider Detector at Fermilab. The p{bar p} collisions were provided by the Tevatron Collider at a center of mass energy of 1.96 TeV. Electroweak theory includes the trilinear vector boson coupling, WW{gamma}, which contributes to the e{nu}{gamma} final state. The electron decay channel of the W provides a clean sample to study the production of diboson pairs. The measurement of the production cross section tests the structure of the non-Abelian character of Electroweak theory.
Book Synopsis Measurement of the $W^+W^-$ Production Cross Section and Search for Anomalous $WW\gamma$ and $WWZ$ Couplings in $p \bar P$ Collisions at $\sqrt{s} by :
Download or read book Measurement of the $W^+W^-$ Production Cross Section and Search for Anomalous $WW\gamma$ and $WWZ$ Couplings in $p \bar P$ Collisions at $\sqrt{s} written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This Letter describes the current most precise measurement of the W boson pair production cross section and most sensitive test of anomalous WW[gamma] and WWZ couplings in p{bar p} collisions at a center-of-mass energy of 1.96 TeV. The WW candidates are reconstructed from decays containing two charged leptons and two neutrinos, where the charged leptons are either electrons or muons. Using data collected by the CDF II detector from 3.6 fb−1 of integrated luminosity, a total of 654 candidate events are observed with an expected background contribution of 320 ± 47 events. The measured total cross section is [sigma](p{bar p} 2!WW− + X) = 12.1 ± 0.9 (stat){sub -1.4}{sup +1.6} (syst) pb, which is in good agreement with the standard model prediction. The same data sample is used to place constraints on anomalous WW[gamma] and WWZ couplings.
Book Synopsis Study of the WW[gamma] and WWZ Interactions at by :
Download or read book Study of the WW[gamma] and WWZ Interactions at written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The[ital WW][gamma] and[ital WWZ] gauge boson couplings have been studied through the direct observation of diboson final states produced in[ital p][ital[anti p]] collisions at[radical]s= 1.8 TeV. The total cross section for[ital W][sub[gamma]] final states, for photons with[ital p][sub T][sup[gamma]][gt] 10 GeV/c and[ital R][sub[ital l][gamma]][gt] 0.7, times branching ratio of[ital W] bosons to leptons, has been measured to be 12.10[sub -1.62][sup+1. 76][+-]1.72 pb, in agreement with the Standard Model expectation. An upper limit of 17 pb on the total[ital WW] cross section has been set. The analysis of[ital W][sub[gamma]] events has allowed us to set 95% confidence level (CL) limits on the anomalous[ital WW][sub[gamma]] coupling parameters of -0.96[lt][Delta][kappa][lt] 0.98 and -0.32[lt][lambda][lt] 0.30. this measurement excludes the U(1)[sub EM]- only coupling between the photon and the[ital W] boson at the 96% CL. Similar measurements of the coupling parameters have been performed using[ital WW] final states.
Book Synopsis First Study of the Radiation-amplitude Zero in W Gamma Production and Limits on Anomalous WW Gamma Couplings at S**1/2 by :
Download or read book First Study of the Radiation-amplitude Zero in W Gamma Production and Limits on Anomalous WW Gamma Couplings at S**1/2 written by and published by . This book was released on 2008 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 上海第一・二師範學院概況 written by and published by . This book was released on 195? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 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 Measurement of W + Gamma Production in the W to Muon Decay Channel in Proton - Anti-proton Collisions at S**(1/2) by :
Download or read book Measurement of W + Gamma Production in the W to Muon Decay Channel in Proton - Anti-proton Collisions at S**(1/2) written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The production cross section and the kinematic properties of the decay products of the W[gamma] in the W [yields] [mu][nu] decay channel from p[bar p] collisions at [radical]s = 1.96 TeV are presented. The measurement use the high p[sub T] muon data from the upgraded Collider Detector at Fermilab (CDF). The data were collected between March 2002 and September 2003. The total integrated luminosities are 192 pb[sup -1] with the muon detector which covers the pseudorapidity region of [eta] [le] 0.6 and 175 pb[sup -1] with the muon detector covering the region 0.6 [le] [eta] [le] 1.0. In the Standard Model the [mu][nu][gamma] final states occur due to W[gamma] [yields] [mu][nu][gamma] production and via muon Bremsstrahlung, W [yields] [mu][nu] [yields] [mu][nu][gamma]. W bosons are selected in their muon decay mode. Additionally, photons with transverse energy above 7 GeV, pseudorapidity in the central region ([eta] 1.1) and muon-photon angular separation [Delta]R([mu], [gamma]) 0.7 are selected. They observe a total of 128 W[gamma] candidates, whereas the Standard Model expectation is 142.4 [+-] 9.5 events. The W[gamma] production cross section is found to be [sigma](p[bar p] [yields] [mu][nu][gamma]) = 16.3 [+-] 2.3(stat.) [+-] 1.8(syst.) [+-] 1.2(lum.) [pb]. The theoretical prediction for this cross section is [sigma](p[bar p] [yields] l[nu][gamma]) = 19.3 [+-] 1.4(th.)[pb]. The Standard Model predictions for several kinematic + variables are compared with data for E[sub T][gamma]> 7 GeV and [Delta]R([mu], [gamma])> 0.7. The measured cross section and the photon and W boson production kinematics are found to agree with the Standard Model predictions.
Book Synopsis A Measurement of the W±Z Production Cross Section and Limits on Anomalous Trilinear Gauge Couplings in Proton-proton Collisions at √s by : Advait Neel Nagarkar
Download or read book A Measurement of the W±Z Production Cross Section and Limits on Anomalous Trilinear Gauge Couplings in Proton-proton Collisions at √s written by Advait Neel Nagarkar and published by . This book was released on 2012 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: I present a measurement of the W±Z production cross section in the leptonic final states in pp collisions at √s = 7 TeV and limits on anomalous trilinear gauge couplings, using 4.64 fb-1 of data collected using the ATLAS experiment at the LHC. The production cross section has been determined to be 19.0+1.4-1.3(stat.)±0.9(syst.)±0.4(lumi.) pb, in agreement with the Standard Model (SM) expectation of 17.6+1.1-1.0 pb. A search for anomalous trilinear gauge couplings has been conducted and limits have been set at the 95% confidence level; the result is consistent with the SM couplings.
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