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Author: W. Fetscher
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Author: W. Fetscher
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Author: Sterling Gray Watson
Publisher:
ISBN:
Category : Leptons (Nuclear physics)
Languages : en
Pages : 286
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Author:
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ISBN:
Category :
Languages : en
Pages : 293
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Using data collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a centre-of-mass energy near 10.58 GeV, the branching fractions B([tau]- 2![pi]-[pi]-[pi]+[nu][tau]) =(8.83±0.01±0.13)%, B([tau]- 2!K-[pi]-[pi]+[nu][tau]) =(0.273± 0.002 ± 0.009)%, B([tau]- 2!K-[pi]-K+[nu][tau]) =(0.1346 ± 0.0010 ± 0.0036)%, and B([tau]- 2!K-K-K+[nu][tau]) =(1.58 ± 0.13 ± 0.12) × 10-5 are measured where the uncertainties are statistical and systematic, respectively. The invariant mass distribution for the [tau]- 2![pi]-[pi]-[pi]+[nu][tau], [tau]- 2!K-[pi]-[pi]+[nu][tau], [tau]- 2!K-[pi]-K+[nu][tau] and [tau]- 2!K-K-K+[nu][tau] decays are unfolded to correct for detector effects. A measurement of B([tau]- 2![phi][pi]-[nu][tau]) =(3.42±0.55±0.25)×10-5, a measurement of B([tau]- 2![phi]K-[nu][tau]) =(3.39±0.20±0.28)× 10-5 and an upper limit on B([tau]- 2!K-K-K+[nu][tau] [ex.[phi]]) d"2.5 × 10-6@90%CL are determined from a binned maximum likelihood fit of the [tau]- 2!K-[pi]-K+[nu][tau] and [tau]- 2!K-K-K+[nu][tau] K+K- invariant mass distributions. The branching ratio B([tau]-2!-[nu][tau])/ B([tau]-2!pi]-[nu][tau]) is measured to be (6.531±0.056±0.093)×10-2 from which.
Author: Paul G Langacker
Publisher: World Scientific
ISBN: 9814602817
Category : Science
Languages : en
Pages : 1032
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High precision measurements of weak neutral current and charged current processes and of the properties of the Z and W bosons have established the standard electroweak model as correct down to a distance scale of 10-16 cm, and are a sensitive probe of possible underlying physics. In this book, all aspects of the program are considered in detail, including the structure of the standard model, radiative corrections, high precision experiments, and their implications. The major classes of experiments are surveyed, covering the experiments themselves, the data analysis, results, and prospects.This volume is a detailed reference for theoretical and experimental researchers, as well as an introductory text for advanced students.
Author: Andrei Gaponenko
Publisher:
ISBN:
Category : Muons
Languages : en
Pages : 202
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Author: Robert Paul MacDonald
Publisher:
ISBN:
Category : Muons
Languages : en
Pages : 340
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![Determination of the structure of τ-decays [tau-decays] in the reaction e+e ̄ → τ+τ ̄ [tau tau] → ρ+ντρ ̄ντ [rho ny tau rho ny tau] and a precision measurement of the τ-neutrino [tau-neutrino] helicity PDF](https://books.google.com/books/content/images/frontcover/ztbBzQEACAAJ?fife=w80-h100)
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Category :
Languages : de
Pages :
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Author: P. Langacker
Publisher: World Scientific Publishing Company Incorporated
ISBN: 9789810212841
Category : Science
Languages : en
Pages : 1008
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I. Introduction : precision tests and particle physics / by Paul Langacker -- II. The standard electroweak model. A. Structure of the standard model / by Paul Langacker -- B. Renormalization of the standard model / by Wolfgang Hollik -- C. Predictions for e+e- processes / by Wolfgang Hollik -- D. Radiative corrections to neutral current processes / by William J. Marciano -- III. Precision tests at e+e- colliders. A. e+e- Annihilation from [symbol]s = 20 to 65 GeV / by Dieter Haidt -- B. Z0-pole experiments -- C. Beam polarization in e+e- annihilation / by Alain Blondel -- D. The LEP 200 programme / by Daniel Treille -- IV. The weak neutral current. A. The measurement of electroweak parameters from deep inelastic neutrino scattering / by Frederic Perrier -- B. Neutrino-proton elastic scattering / by Alfred K. Mann -- C. Neutrino-electron scattering / by Jaap Panman -- D. Atomic parity nonconservation experiments / by B. Patrick Masicrsvn and Carl E. Wieman -- E. The theory of atomic parity violation / by S. A. Blundell, W. R. Johnson, and Jonathan Sapirstein -- F. Charged Lepton-Hadron asymmetries in fixed target experiments / by Paul Souder -- G. Precision electroweak tests at HERA / by Hubert Spiesberger -- V. The weak charged current. A. precision measurements in muon and tau decays / by Wulf Fetscher and H.-J. Gtrber -- B. Symmetry-tests in semileptonic weak interactions : a search for new physics / by Jules Dtutsch and Paid Quin -- C. Universality of the weak interactions / by Alberto Sirlin -- D. Beta decay and muon decay beyond the standard model / by Peter Herczeg -- VI. Precision tests at hadron colliders / by Kevin Einsweiler -- VII. Implications of precision experiments. A. Tests of the standard model and searches for new physics / by Paul Langacker -- B. Exotic fermions / by David London -- VIII . The future / by Mingxing Luo
Author:
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ISBN:
Category :
Languages : en
Pages : 3
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Measurements of the [tau] decay modes are reviewed and compared with the predictions of the Standard Model. While the agreement is generally good, the status of the 1-prong puzzle'' remains controversial and a discrepancy between the measured leptonic branching fractions and the [tau] lifetime persists. Prospects for precision measurements at a Tau-Charm Factory are also reviewed. 20 refs., 2 tabs.
Author: Maurice Lévy
Publisher: Springer Science & Business Media
ISBN: 1489902422
Category : Science
Languages : en
Pages : 395
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Book Description
Proceedings of a NATO ASI held in Cargèse, France, August 5-17, 1996
