Search for excited leptons at 130-140 GeV

D. Buskulic*, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J. P. Lees, A. Lucotte, M. N. Minard, J. Y. Nief, P. Odier, B. Pietrzyk, M. P. Casado, M. Chmeissani, J. M. Crespo, M. Delfino, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, Ll Garrido, A. JusteM. Martinez, S. Orteu, C. Padilla, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, F. Teubert, A. Colaleo, D. Creanza, M. De Palma, G. Gelao, M. Girone, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, R. Alemany, A. O. Bazarko, M. Cattaneo, P. Comas, P. Coyle, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, G. Lutters, E. B. Martin, P. Mato, A. Minten, R. Miquel, Ll M. Mir, L. Moneta, T. Oest, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, P. Rensing, L. Rolandi, D. Schlatter, M. Schmelling, M. Schmitt, O. Schneider, W. Tejessy, I. R. Tomalin, A. Venturi, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barrès, C. Boyer, A. Falvard, P. Gay, C. Guicheney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

A search for the radiative decay of excited charged leptons, ℓ*, and for radiative and weak decays of excited electron neutrinos, νe*, is performed, using the 5.8 pb-1 of data collected by ALEPH at 130-140GeV. No evidence for a signal is found in single or pair production. Excluded mass limits from pair production are close to 65 GeV/c2 for all excited lepton species. Limits on the couplings, λ/mℓ*, of excited leptons are derived from single production. For an excited lepton mass of 130GeV/c2, these limits are 0.04GeV-1 for μ* and τ*, and 0.0007GeV-1 for e* For νe*, the limit is at the level of 0.03 GeV-1 for a mass of 120GeV/c2, independent of the decay branching ratios.

Original languageEnglish (US)
Pages (from-to)445-453
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume385
Issue number1-4
DOIs
StatePublished - Sep 26 1996

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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