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 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The decay?− → K−??{sub?} has been observed with the CLEO II detector. The? meson is reconstructed using two decay channels,? →?? and??−?°. The measured branching fraction is B(?− → K−??{sub?}) = (2.6 ± 0.5 ± 0.5) x 10−4, somewhat higher than the theoretical estimates. An improved upper limit for the second-class-current decay {tau}− →?−??{sub {tau}} is set, B({tau}− →?−??{sub {tau}})

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 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:

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 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 High Energy Physics Index written by and published by . This book was released on 1990 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Observation of the Decays Tau Eta X Tau Infinity X written by and published by . This book was released on 1986 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Tau Neutrino Mass and the Michel Parameter in Tau Decay written by Steven Daniel Holzner and published by . This book was released on 1987 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book First Measurement of the Tau Neutrino Charged current Interaction Cross Section written by Patrick Berghaus and published by . This book was released on 2001 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reducing Background in the Tau Neutrino Mass Limiting Decay Tau K Ks Rho0 Nu tau written by Preema R. Pais and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A First Measurement of the Interaction Cross section of the Tau Neutrino written by and published by . This book was released on 2007 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The DONuT experiment collected data in 1997 and published first results in 2000 based on four observed [nu]{sub {tau}} charged-current (CC) interactions. The final analysis of the data collected in the experiment is presented in this paper, based on 3.6 x 1017 protons on target using the 800 GeV Tevatron beam at Fermilab. The number of observed [nu]{sub {tau}} CC interactions is 9, from a total of 578 observed neutrino interactions. We calculated the energy-independent part of the tau-neutrino CC cross section ([nu] + {bar [nu]}), relative to the well-known [nu]{sub e} and [nu]{sub {mu}} cross sections. The ratio [sigma]([nu]{sub {tau}})/[sigma]([nu]{sub e, {mu}}) was found to be 1.37 ± 0.35 ± 0.77. The {nu}{sub {tau}} CC cross section was found to be 0.72 ± 0.24 ± 0.36 x 10−38 cm2 GeV−1. Both results are in agreement with expectations from the Standard Model.

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 Study of the Decay tau Minus Goes to Pi Minus Pi Zero Tau Neutrino Using the BABAR Detector written by Mitchell Thomas Naisbit and published by . This book was released on 2006 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tau Neutrino Component to Tritium Beta Decay written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A framework is given for explaining anomalous results of neutrino mass experiments that measure the high energy electron spectrum of tritium[beta] decay. The experimental results have been fit to a negative neutrino mass square. We show that there is a consistent phenomenological interpretation due to a positive mass tau neutrino component of the[beta] decay spectrum, with strong near threshold final state interactions with the He nucleus. If this enhancement is due to new interactions between low energy tau neutrinos and nuclei, then the tritium 0 decay experiments could be used as detectors for cosmic background tau neutrinos. The model predicts a distinctive spectrum shape that is consistent with a recent high statistics LLNL experiment. A fit to the experiment gives a tau neutrino mass of 23 eV. Tau neutrinos of this mass would dominate the mass of the universe. Requirements for a theoretical model are given, as well as models that realize different aspects of these requirements. While qualitatively successful, the theoretical models have such severe quantitative difficulties that the accuracy of the molecular physics of the T-[sup 3]He ion, assumed in the analysis of the experimental data, is called into question.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.

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.