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Radiative τ pair production and search for new particles decaying into τ

Research output: Contribution to journalJournal article


  • JADE Collaboration
<mark>Journal publication date</mark>1986
<mark>Journal</mark>Zeitschrift für Physik C Particles and Fields
Issue number3
Number of pages1
Pages (from-to)359
<mark>Original language</mark>English


A study of radiative τ pair production,e + e −→τ+τ−γ ande + e −→τ+τ−γγ, is presented. The observed events agree with QED predictions of order α3 and α4. Excited τ′s have been searched for and lower limits on single and pair production are obtained. For QED-like coupling the τ* mass is limited to values greater than 40 GeV (95% CL). A search for unstable charged scalars (S ±) decaying into τ, e.g. charged Higgs, technipions or the supersymmetric partners of τ′s, yields no evidence for such particles. Assuming a branching fraction ofB(S→τν)=1,S masses up to 18.7 GeV are excluded with 95% CL.