Electron-positron bremsstrahlung at ADONE. A new limit for the existence of a heavy electron |
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| Authors: | C Bacci G De Zorzi G Penso B Stella R Baldini-Celio G Capon R Del Fabbro M Grilli AF Grillo E Iarocci C Mencuccini GP Murtas M Spinetti V Valente |
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| Institution: | Istituto di Fisica dell''Università di Roma, and Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Italy;Laboratori Nazionali di Frascati dell''INFN, Frascati, Italy |
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| Abstract: | A new measurement of the cross section for the reaction e+e? → e+e?γ has been performed at the ADONE storage ring, using a wide angle electromagnetic detector together with tagging counters for detecting small-angle electrons. The results are in agreement with the QED predictons. New limits for the mass and coupling constant (e1, eγ) of a heavy electron, e1, have been established. |
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