Search for heavy neutral and charged leptons in e+e- annihilation at √s = 183 and 189 GeV

L3 Collaboration

doi:10.1016/S0370-2693(99)00922-3

Search for heavy neutral and charged leptons in e⁺e^- annihilation at √s = 183 and 189 GeV

L3 Collaboration

Physics

National Institute for Nuclear Physics
University of Geneva
University of Florence
CIEMAT
University of Lausanne
CERN
Swiss Federal Institute of Technology Zurich
Louisiana State University
Nuclear Physics Institute
University of Bucharest
University of Bologna
Alikhanov Institute for Theoretical and Experimental Physics
University of Michigan, Ann Arbor
Tata Institute of Fundamental Research
University of Rome La Sapienza
University of Alabama
IN2P3-CNRS
Paul Scherrer Institute
Massachusetts Institute of Technology
Carnegie Mellon University
University of Amsterdam
RWTH Aachen University
Hungarian Academy of Sciences

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons is performed at center-of-mass energies √s = 183 and 189 GeV with the L3 detector at LEP. No evidence for their existence is found. We exclude neutral heavy leptons which couple to the electron, muon or tau family, of the Dirac type for masses below 92.4, 93.3 and 83.3 GeV, and of the Majorana type for masses below 81.8, 84.1 and 73.5 GeV, respectively. We exclude unstable charged heavy leptons for masses below 93.9 GeV for a wide range of the associated neutral heavy lepton mass. If the unstable charged heavy lepton decays to a light neutrino, we exclude masses below 92.4 GeV. The production of stable charged heavy leptons with mass less than 93.5 GeV is also excluded.

Original language	English
Pages (from-to)	354-364
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	462
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(99)00922-3
State	Published - 1999

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10.1016/S0370-2693(99)00922-3

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@article{6336378fde7b4396a0aa0f0ccf862d6d,

title = "Search for heavy neutral and charged leptons in e+e- annihilation at √s = 183 and 189 GeV",

abstract = "A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons is performed at center-of-mass energies √s = 183 and 189 GeV with the L3 detector at LEP. No evidence for their existence is found. We exclude neutral heavy leptons which couple to the electron, muon or tau family, of the Dirac type for masses below 92.4, 93.3 and 83.3 GeV, and of the Majorana type for masses below 81.8, 84.1 and 73.5 GeV, respectively. We exclude unstable charged heavy leptons for masses below 93.9 GeV for a wide range of the associated neutral heavy lepton mass. If the unstable charged heavy lepton decays to a light neutrino, we exclude masses below 92.4 GeV. The production of stable charged heavy leptons with mass less than 93.5 GeV is also excluded.",

author = "\{L3 Collaboration\} and M. Acciarri and P. Achard and O. Adriani and M. Aguilar-Benitez and J. Alcaraz and G. Alemanni and J. Allaby and A. Aloisio and Alviggi, \{M. G.\} and G. Ambrosi and H. Anderhub and Andreev, \{V. P.\} and T. Angelescu and F. Anselmo and A. Arefiev and T. Azemoon and T. Aziz and P. Bagnaia and L. Baksay and A. Balandras and Ball, \{R. C.\} and S. Banerjee and Sw Banerjee and A. Barczyk and R. Barillere and L. Barone and P. Bartalini and M. Basile and R. Battiston and A. Bay and F. Becattini and U. Becker and F. Behner and J. Berdugo and P. Berges and B. Bertucci and Betev, \{B. L.\} and S. Bhattacharya and M. Biasini and A. Biland and Blaising, \{J. J.\} and Blyth, \{S. C.\} and Bobbink, \{G. J.\} and A. Bohm and L. Boldizsar and B. Borgia and D. Bourilkov and M. Bourquin and S. Braccini and I. Iashvili",

year = "1999",

doi = "10.1016/S0370-2693(99)00922-3",

language = "English",

volume = "462",

pages = "354--364",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "3-4",

}

TY - JOUR

T1 - Search for heavy neutral and charged leptons in e+e- annihilation at √s = 183 and 189 GeV

AU - L3 Collaboration

AU - Acciarri, M.

AU - Achard, P.

AU - Adriani, O.

AU - Aguilar-Benitez, M.

AU - Alcaraz, J.

AU - Alemanni, G.

AU - Allaby, J.

AU - Aloisio, A.

AU - Alviggi, M. G.

AU - Ambrosi, G.

AU - Anderhub, H.

AU - Andreev, V. P.

AU - Angelescu, T.

AU - Anselmo, F.

AU - Arefiev, A.

AU - Azemoon, T.

AU - Aziz, T.

AU - Bagnaia, P.

AU - Baksay, L.

AU - Balandras, A.

AU - Ball, R. C.

AU - Banerjee, S.

AU - Banerjee, Sw

AU - Barczyk, A.

AU - Barillere, R.

AU - Barone, L.

AU - Bartalini, P.

AU - Basile, M.

AU - Battiston, R.

AU - Bay, A.

AU - Becattini, F.

AU - Becker, U.

AU - Behner, F.

AU - Berdugo, J.

AU - Berges, P.

AU - Bertucci, B.

AU - Betev, B. L.

AU - Bhattacharya, S.

AU - Biasini, M.

AU - Biland, A.

AU - Blaising, J. J.

AU - Blyth, S. C.

AU - Bobbink, G. J.

AU - Bohm, A.

AU - Boldizsar, L.

AU - Borgia, B.

AU - Bourilkov, D.

AU - Bourquin, M.

AU - Braccini, S.

AU - Iashvili, I.

PY - 1999

Y1 - 1999

N2 - A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons is performed at center-of-mass energies √s = 183 and 189 GeV with the L3 detector at LEP. No evidence for their existence is found. We exclude neutral heavy leptons which couple to the electron, muon or tau family, of the Dirac type for masses below 92.4, 93.3 and 83.3 GeV, and of the Majorana type for masses below 81.8, 84.1 and 73.5 GeV, respectively. We exclude unstable charged heavy leptons for masses below 93.9 GeV for a wide range of the associated neutral heavy lepton mass. If the unstable charged heavy lepton decays to a light neutrino, we exclude masses below 92.4 GeV. The production of stable charged heavy leptons with mass less than 93.5 GeV is also excluded.

AB - A search for unstable neutral and charged heavy leptons as well as for stable charged heavy leptons is performed at center-of-mass energies √s = 183 and 189 GeV with the L3 detector at LEP. No evidence for their existence is found. We exclude neutral heavy leptons which couple to the electron, muon or tau family, of the Dirac type for masses below 92.4, 93.3 and 83.3 GeV, and of the Majorana type for masses below 81.8, 84.1 and 73.5 GeV, respectively. We exclude unstable charged heavy leptons for masses below 93.9 GeV for a wide range of the associated neutral heavy lepton mass. If the unstable charged heavy lepton decays to a light neutrino, we exclude masses below 92.4 GeV. The production of stable charged heavy leptons with mass less than 93.5 GeV is also excluded.

UR - https://www.scopus.com/pages/publications/0001443489

U2 - 10.1016/S0370-2693(99)00922-3

DO - 10.1016/S0370-2693(99)00922-3

M3 - Article

AN - SCOPUS:0001443489

SN - 0370-2693

VL - 462

SP - 354

EP - 364

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Search for heavy neutral and charged leptons in e⁺e^- annihilation at √s = 183 and 189 GeV

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