A Search for Excited Leptons in the Energy Region s=52\sqrt{s}=52-{GeV} - 60.8-{GeV}

Collaboration
Sep, 1989
7 pages
Published in:
  • Phys.Lett.B 228 (1989) 553-559
  • Published: 1989
Report number:
  • KEK-PREPRINT-89-90,
  • DPNU-89-45,
  • INS-767,
  • KOBE-HEP-89-07,
  • NWU-HEP-89-03,
  • OCU-HEP-89-03,
  • PU-89-634,
  • TU-HEP-89-02,
  • TUAT-HEP-89-02,
  • UT-HE-89-07
Experiments:

Citations per year

198919901991199219933510
Abstract: (Elsevier)
Excited leptons, e ∗ , μ ∗ and τ ∗ , have been searched for with the TOPAZ detector at TRISTAN e + e − collider in the energy region s =52−60.8 GeV . e ∗ and μ ∗ have been searched for in the single production process, e + e − → ι + ι − γ , and the pair production process, e + e − → ι + ι − γ , where ι stands for e or μ.e ∗ has also been searched for in the processes e + e − →e γ (e) (quasi-real Compton scattering) and e + e − →γγ.τ ∗ has been searched for in the τ ∗ -pair production process, e + e − → τ + τ − γγ . No evidence for the production of excited leptons has been found, and new limits on e ∗ , μ ∗ and τ ∗ production are set.
  • ELECTRON POSITRON: ANNIHILATION
  • ANNIHILATION: ELECTRON POSITRON
  • ELECTRON POSITRON: COLLIDING BEAMS
  • COLLIDING BEAMS: ELECTRON POSITRON
  • LEPTON: EXCITED STATE
  • UPPER LIMIT
  • MASS SPECTRUM
  • ANGULAR DISTRIBUTION
  • TOPAZ
  • EXPERIMENTAL RESULTS