Download or read book First Observation of Lepton Tau Decays to Neutrino K and Eta written by Guoheng Wei and published by . This book was released on 1995 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book First Observation of the Decay Tau K Eta Tau neutrino written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The decay[tau][sup -][yields] K[sup -][eta][nu][sub[tau]] has been observed with the CLEO II detector. The[eta] meson is reconstructed using two decay channels, [eta][yields][gamma][gamma] and[pi][sup+][pi][sup -][pi][sup 0]. The measured branching fraction is B([tau][sup -][yields] K[sup -][eta][nu][sub[tau]])= (2.6[+-] 0.5[+-] 0.5) x 10[sup -4], somewhat higher than the theoretical estimates. An improved upper limit for the second-class-current decay[tau][sup -][yields][pi][sup -][eta][nu][sub[tau]] is set, B([tau][sup -][yields][pi][sup -][eta][nu][sub[tau]])

Download or read book First Observation of Tau 3 Pi Eta Tau neutrino and Tau F1 Pi Tau neutrino Decays written by and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Tau Lepton Decays to Three Charged Hadrons and One Neutral Pion written by Kregg E. Arms and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We report a study of [tau] lepton decays to three charged hadrons and a [pi]0. We use (7.56 +/- 0.15) fb −1 of data collected with the CLEO III detector at the Y (4S) resonance, which corresponds to a total of (6.90 +/- 0.14) x 106 [tau]-pairs. Using both a Ring Imaging Cherenkov (RICH) detector and measurement of specific ionization energy loss (dE/dx) for particle identification, we report the first observation of the decay [tau]− [right arrow] K−[omega][tau neutrino]. We report the first statistically significant measurements of the branching fractions for [tau]− [right arrow] K−[pi][pi]−[pi]0[tau neutrino] (excluding K0), [tau]− [right arrow] K−K[pi]−[pi]0[tau neutrino] and the first published upper limit for [tau]− [right arrow] K−K+K−[pi]0[tau neutrino]. We also measure branching fractions for the decays, [tau]− [right arrow] h−[omega][tau neutrino], [tau]− [right arrow] [pi]−[omega][tau neutrino], [tau]− [right arrow] h−h+h−[pi]0[tau neutrino], and [tau]− [right arrow] [pi]−[pi]+[pi]−[pi]0[tau neutrino].

Download or read book Second Class Current Effects in Tau Lepton Decay written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments to see the effects of second class currents in neutrino interactions are described. Evidence from tau lepton decay is discussed, including the ''one-prong anomaly'' and direct observation of eta meson production in tau decay. (LEW).

Download or read book Tau Decays Into Three Charged Leptons and Two Neutrinos written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for the radiative leptonic tau decays[tau][yields] ee[sup+]e[sup -][nu][sub[tau]][nu][sub e] and[tau][yields][mu]e[sup+]e[sup -][nu][sub[tau]][nu][sub[mu]] using 3.60 fb[sup -1] of data collected by the CLEO-II experiment at CESR. We present a first observation of the[tau][yields] ee[sup+]e[sup -][nu][sub[tau]][nu][sub e] process. For this channel we measure the branching fraction B([tau][yields] ee[sup+]e[sup -][nu][sub[tau]][nu][sub e])= (2.8[+-] 1.4[+-] 0.4) x 10[sup -5]. An upper limit is established for the second channel: B([tau][yields][mu]e[sup+][nu][sub[tau]][nu][sub[mu]])

Download or read book Observation of the Charged current Interactions of the Tau Neutrino written by Jason Murry Sielaff and published by . This book was released on 2002 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strange Decays of the Tau Lepton written by and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of hadronic [tau] decays to states containing at least one strange meson are reviewed. New results are presented from a self-consistent analysis of one-prong decays including kaons and from a study of the kaon content in three-prong decays. First observations of the resonance contribution to the strange axial-vector channel are reported. The findings are compared to model predictions of K[sub 1] mixing and interference in [tau] decay.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for W Decaying to Tau Lepton and Neutrino in Proton proton Collisions at sqrt s written by and published by . This book was released on 2016 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: We found that the first search for a heavy charged vector boson in the final state with a tau lepton and a neutrino is reported, using 19.7 fb-1 of LHC data at √s = 8 TeV. A signal would appear as an excess of events in kinematic regions where the standard model background is low. No excess is observed. Limits are set on a model in which the W' decays preferentially to fermions of the third generation. Our results substantially extend previous constraints on this model. Masses below 2.0 to 2.7 TeV are excluded, depending on the model parameters. In addition, the existence of a W' boson with universal fermion couplings is excluded at 95% confidence level, for W' masses below 2.7 TeV.

Download or read book Search for Neutrinoless Tau Decays Involving Pi0 Or Eta Mesons written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for lepton family number violating decays of the[tau] lepton using final states with an electron or a muon and one or more[pi][sup 0] or[eta] mesons but no neutrinos. The data used in the search were collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR) and correspond to an integrated luminosity of 4.68 fb[sup -1]. No evidence for signals was found, resulting in much improved limits on the branching fractions for the one-meson modes and the first upper limits for the two-meson modes.

Download or read book Decays of the Tau Lepton written by Patricia Burchat and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1986 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Decays of the Heavy Lepton Tau 1785 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The structure of the weak hadronic current coupled to the tau is investigated via some of the hadronic decays of the tau. The vector current coupling is determined by measuring the tau .-->. rho .nu./sub tau/ branching ratio. The axial-vector coupling is determined by measuring the tau .-->. .pi. .nu./sub tau/ branching ratio. The Cabibbo structure of the hadronic current is established by observing the decay tau .-->. K*(890).nu./sub tau/ and measuring its branching ratio. The branching ratios for the decays tau .-->. e anti .nu./sub e/.nu./sub tau/ and tau .-->. .mu. anti .nu./sub .mu./.nu./sub tau/ are measured as a normalization for the hadronic decays and as a check on the validity of the measurements. The leptonic branching ratios agree well with previous experiments. From a kinematic fit to the pion energy spectrum in the decay tau .-->. .pi. .nu./sub tau/, an upper limit (95% confidence level) of 245 MeV is placed on the tau neutrino mass. From a simultaneous fit of the center of mass energy dependence of the tau production cross section and the pion energy spectrum in the decay tau .-->. .pi. .nu./sub tau/, the tau mass is determined to be 1.787 +- 010 GeV/c. All properties of the tau measured here are consistent with it being a sequential lepton coupled to the ordinary weak hadronic current.

Download or read book Decays of the Heavy Lepton Tau 1785 written by Craig Alan Blocker and published by . This book was released on 1980 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A TAU Neutrino Mass Upper Limit from the Four pion Decay of the TAU Lepton written by David Stanley Crowcroft and published by . This book was released on 1998 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Energy Physics Index written by and published by . This book was released on 1990 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Observation of the Decay tau right Arrow pi neutrino written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: