Three-prong τ decays with charged kaons

被引：0

作者：

Barate R. ^{[1
]}

Buskulic D. ^{[1
]}

Decamp D. ^{[1
]}

Ghez P. ^{[1
]}

Goy C. ^{[1
]}

Lees J.-P. ^{[1
]}

Lucotte A. ^{[1
]}

Minard M.-N. ^{[1
]}

Nief J.-Y. ^{[1
]}

Pietrzyk B. ^{[1
]}

Casado M.P. ^{[2
]}

Chmeissani M. ^{[2
]}

Comas P. ^{[2
]}

Crespo J.M. ^{[2
]}

Delfino M. ^{[2
]}

Fernandez E. ^{[2
]}

Fernandez-Bosman M. ^{[2
]}

Garrido L. ^{[2
]}

Juste A. ^{[2
]}

Martinez M. ^{[2
]}

Merino G. ^{[2
]}

Miquel R. ^{[2
]}

Mir L.M. ^{[2
]}

Padilla C. ^{[2
]}

Park I.C. ^{[2
]}

Pascua A. ^{[2
]}

Perlas J.A. ^{[2
]}

Riu I. ^{[2
]}

Sanchez F. ^{[2
]}

Teubert F. ^{[2
]}

Colaleo A. ^{[3
]}

Creanza D. ^{[3
]}

de Palma M. ^{[3
]}

Gelao G. ^{[3
]}

Iaselli G. ^{[3
]}

Maggi G. ^{[3
]}

Maggi M. ^{[3
]}

Marinelli N. ^{[3
]}

Nuzzo S. ^{[3
]}

Ranieri A. ^{[3
]}

Raso G. ^{[3
]}

Ruggieri F. ^{[3
]}

Selvaggi G. ^{[3
]}

Silvestris L. ^{[3
]}

Tempesta P. ^{[3
]}

Tricomi A. ^{[3
]}

Zito G. ^{[3
]}

Huang X. ^{[4
]}

Lin J. ^{[4
]}

Ouyang Q. ^{[4
]}

机构：

[1] Laboratoire de Physique des Particules (LAPP), INP-CNRS, Annecy-le-Vieux Cedex

[2] Institut de Física d'Altes Energies, Universitat Autònoma de Barcelona, Bellaterra (Barcelona)

[3] Dipartimento di Fisica, INFN Sezione di Bari, Bari

[4] Institute of High-Energy Physics, Academia Sinica, Beijing

[5] European Laboratory for Particle Physics (CERN), Geneva

[6] Laboratoire de Physique Corpusculaire, Université Blaise Pascal, Aubière

[7] Niels Bohr Institute, Copenhagen

[8] Nuclear Research Center Demokritos (NRCD), Athens

[9] Laboratoire de Physique Nucléaire et des Hautes Energies, Ecole Polytechnique, INP-CNRS, Palaiseau Cedex

[10] Department of Physics, University of Edinburgh, Edinburgh

[11] Dipartimento di Fisica, Università di Firenze, INFN Sezione di Firenze, Firenze

[12] Supercomputer Computations Research Institute, Florida State University, Tallahassee

[13] Laboratori Nazionali dell'INFN (LNF-INFN), Frascati

[14] Department of Physics and Astronomy, University of Glasgow, Glasgow

[15] Institut für Hochenergiephysik, Universität Heidelberg, Heidelberg

[16] Department of Physics, Imperial College, London

[17] Institut für Experimentalphysik, Universität Innsbruck, Innsbruck

[18] Department of Physics, University of Lancaster, Lancaster

[19] Institut für Physik, Universität Mainz, Mainz

[20] Centre de Physique des Particules, Faculté des Sciences de Luminy, INP-CNRS, Marseille

[21] Dipartimento di Fisica, Università di Milano, e INFN Sezione di Milano, Milano

[22] Max-Planck-Institut für Physik, Werner-Heisenberg-Institut, München

[23] Laboratoire de l'Accélérateur Linéaire, Université de Paris-Sud, INP-CNRS, Orsay Cedex

[24] Dipartimento di Fisica dell'Università, INFN Sezione di Pisa, e Scuola Normale Superiore, Pisa

[25] Department of Physics, Royal Holloway & Bedford New College, University of London, Surrey

[26] Particle Physics Department, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon

[27] CEA, DAPNIA/Service de Physique des Particules, CE-Saclay, Gif-sur-Yvette Cedex

[28] Institute for Particle Physics, University of California at Santa Cruz, Santa Cruz

[29] Department of Physics, University of Sheffield, Sheffield

[30] Fachbereich Physik, Universität Siegen, Siegen

[31] Dipartimento di Fisica, Università di Trieste, e INFN Sezione di Trieste, Trieste

[32] Experimental Elementary Particle Physics, University of Washington, Seattle

[33] Department of Physics, University of Wisconsin, Madison

来源：

The European Physical Journal C | 1998年 / 1卷 / 1-2期

关键词：

Systematic Uncertainty; Time Projection Chamber; Invariant Mass Spectrum; Charged Track; Aleph Collaboration;

D O I：

10.1007/BF01245798

中图分类号：

学科分类号：

摘要：

Final states with charged kaons in three-prong τ decays are studied by exploiting the particle identification from the dE/dx measurement. The results are based on a sample of about 1.6 x 105 detected τ pairs collected with the ALEPH detector between 1991 and 1995 around the Z peak. The following branching ratios have been measured: B(τ- → K-K+π-ντ) = (1.63 ± 0.21 ± 0.17) x 10-3, B(τ- → K-π+π-ντ)=(2.14 ± 0.37 ± 0.29) x 10-3, B (τ- → K-K+π-π0ντ) = (0.75 ± 0.29 ± 0.15) x 10-3, and B(τ- → K-π+π-π0ν τ) = (0.61 ± 0.39 ± 0.18) x 10-3. The first two measurements are more precise than the current world averages, while the last two channels are investigated for the first time. The 95% C.L. upper limit on the branching ratio for the decay τ- → K-K+K-ντ is 0.19 x 10-3. A study of intermediate states occurring in the K-K+π-ντ and K-π+π-ντ decays is also presented.

引用

页码：65 / 79

页数：14

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