edited by Nicola Cabibbo (Univ. Rome)

This reprint volume is in honour of one of the leaders of Italian high-energy physics, Antonino Zichichi, who is now 65 years old. It covers the first part of his activity: the years 1959–1976, probably the most intense of his scientific career. The volume includes reprints of articles and of some published laboratory reports, documenting the extraordinary constancy of Zichichi in a scientific programme which spanned more than a decade and laid the foundations for the subsequent discovery by M Perl of the heavy lepton, HL (now called τ), first proposed and searched for at CERN and Frascati by Zichichi in the early sixties.

• The Anomalous Magnetic Moment of the Muon (G Charpak et al.)
• A Telescope to Identify Electrons in the Presence of Pion Background (T Massam et al.)
• Proton–Antiproton Annihilation into Electrons, Muons and Vector Bosons (A Zichichi et al.)
• An Experiment on the Time-Like Electromagnetic Structure of the Proton (M Conversi et al.)
• The Leptonic Annihilation Modes of the Proton–Antiproton System at 6.8 (GeV/c)² Timelike Four-Momentum Transfer (M Conversi et al.)
• Validity of the Leptonic Selection Rules for the (μeγ) Vertex at High Four-Momentum Transfers (V Alles-Borelli et al.)
• Limits on the Electromagnetic Production of Heavy Leptons (V Alles-Borelli et al.)
• Experimental Proof of the Inadequacy of the Peaking Approximation in Radiative Corrections (V Alles-Borelli et al.)
• Limits on the Mass of Heavy Leptons (M Bernardini et al.)
• Why (e⁺e^-) Physics Is Fascinating (A Zichichi)
• and other papers