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    Search for lepton flavour violation in Z0 decays (English)

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    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; 271 , 3-4 ; 453-460  ; 1991
    • ISSN:
      0370-2693
    • Article (Journal)  /  Electronic Resource

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    AbstractWe have searched for lepton flavour violation in Z0 boson decays into lepton pairs, Z0→μτ, Z0→eτ, and Z0→eμ. The data sample is based on an integrated luminosity of 10.4 pb-1 corresponding to 370 000 Z0's produced. We obtain upper limits on the branching ratios of 4.8×10-5 for the μτ, 3.4×10-5 for the eτ and 2.4×10-5 for the eμ decay modes at the 95% confidence level.

    Table of contents – Volume 271, Issue 3-4

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    277
    Magnetic susceptibility of neutron matter in a relativistic σ+ω+π+ϱ Hartree-Fock approach
    Marcos, S. / Niembro, R. / Quelle, M.L. / Navarro, J. et al. | 1991
    281
    Symmetries of the nuclear average field hamiltonian and a search for possible exotic equilibrium deformations in superdeformed nuclei
    Xunjun Li / Dudek, Jerzy / Romain, Pascal et al. | 1991
    290
    Pionic atoms, the relativistic mean-field theory and the pion-nucleon scattering lengths
    Goudsmit, P.F.A. / Leisi, H.J. / Matsinos, E. et al. | 1991
    295
    O (d) ⊗ O (d) symmetry of the space of cosmological solutions in string theory, scale factor duality, and two-dimensional black holes
    Sen, Ashoke et al. | 1991
    301
    Degeneracy of string states in 2D black hole and a new derivation of SU (1, 1) parafermion characters
    Sfetsos, Konstadinos et al. | 1991
    307
    All-loop gauge couplings from anomaly cancellation in string effective theories
    Derendinger, Jean-Pierre / Ferrara, Sergio / Kounnas, Costas / Zwirner, Fabio et al. | 1991
    314
    Quantum symmetries in the free field realization of Wn algebras
    Cuerno, R. et al. | 1991
    321
    Real forms of complex quantum anti-de-Sitter algebra Uq(Sp(4; C )) and their contraction schemes
    Lukierski, Jerzy / Nowicki, Anatol / Ruegg, Henri et al. | 1991
    329
    Thermodynamic Bethe ansatz equations for perturbed minimal conformal field theories
    Ahn, Changrim / Nam, Soonkeon et al. | 1991
    337
    Loop algebras and symmetries related to both a compact and a noncompact version of a (2+1)-dimensional spin model
    Profilo, G. / Soliani, G. / Solombrino, L. et al. | 1991
    343
    Kac-Moody gauge fields and matter fields in d dimensions
    Baaquie, Belal E. et al. | 1991
    347
    A novel feature of the Kac-Moody algebra and nonlinear integrable models
    Kawai, E. et al. | 1991
    350
    Local supersymmetry of the Chern-Simons theory
    Lucchesi, Claudio / Piguet, Olivier et al. | 1991
    355
    More about the (2,0) supersymmetric WZNW model in (2,0) superspace
    Gates, S.James Jr. / Ketov, Sergay V. et al. | 1991
    361
    Supersymmetric instantons and heterotic solitons
    Martin, I. / Restuccia, A. et al. | 1991
    365
    Supersymmetry and loop space geometry
    Morozov, A.Yu. / Niemi, Antti J. / Palo, K. et al. | 1991
    372
    Quantum mechanics on the circle and W1+∞
    Floreanini, R. / Percacci, R. / Sezgin, E. et al. | 1991
    377
    Do cosmic strings determine the number of generations?
    Koca, Mehmet et al. | 1991
    383
    On the masses in the third family
    Schlereth, H. et al. | 1991
    391
    Color invariant additive fluxes for SU (3) gauge theory
    Anishetty, Ramesh / Gadiyar, G.H. / Mathur, Manu / Sharatchandra, H.S. et al. | 1991
    395
    Quark-number susceptibility and fluctuations in the vector channel at high temperatures
    Kunihiro, Teiji et al. | 1991
    403
    Low energy effective hamiltonian for ΔI = 1 nuclear parity violation and nucleonic strangeness
    Dai, Jin / Savage, Martin J. / Liu, Jun / Springer, Roxanne et al. | 1991
    410
    Semileptonic decay of baryons with two heavy quarks
    White, Martin J. / Savage, Martin J. et al. | 1991
    415
    Is f0 (975) a QCD dilaton?
    Halyo, E. et al. | 1991
    421
    1 m c suppressed semi-leptonic Λb decays
    Mannel, Thomas / Roberts, Winston / Ryzak, Zbigniew et al. | 1991
    425
    Excess of τ+τ- V events in Z decays A naive look
    Gastmans, R. / Troost, W. / Tai, Tsun Wu et al. | 1991
    431
    Bhabha scattering at LEP. Small angle
    Cacciari, M. / Deandrea, A. / Montagna, G. / Nicrosini, O. / Trentadue, L. et al. | 1991
    435
    Hard photon corrections to Bhabha scattering near the Z0
    Aversa, F. / Greco, M. et al. | 1991
    440
    Co-planar events, QCD jets and diffractive dissociations
    He, Y.D. / Zhu, Q.Q. / Huo, A.X. et al. | 1991
    447
    Antiproton production in 14.6 A GeV c Si +A collisions
    Abbott, T. / Akiba, Y. / Beavis, D. / Bloomer, M.A. / Bond, P.D. / Chasman, C. / Chen, Z. / Chu, Y.Y. / Cole, B.A. / Costales, J.B. et al. | 1991
    453
    Search for lepton flavour violation in Z0 decays
    Adeva, B. / Adriani, O. / Aguilar-Benitez, M. / Akbari, H. / Alcaraz, J. / Aloisio, A. / Alverson, G. / Alviggi, M.G. / Ambrosi, G. / An, Q. et al. | 1991
    461
    Measurement of the strong coupling constant αS for bottom quarks at the Z0 resonance
    Adeva, B. / Adriani, O. / Aguilar-Benitez, M. / Akbari, H. / Alcaraz, J. / Aloisio, A. / Alverson, G. / Alviggi, M.G. / Ambrosi, G. / An, Q. et al. | 1991
    468
    Errata
    | 1991
    469
    Author index to volume 271
    | 1991
    473
    Instruction to authors
    | 1991

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