A search for excited electrons in the e +e − reactions up to the √ s of 56 GeV

K Abe ,M Wakai,S Uehara,Y Hojyo,F Suekane,M Shioden,I Hayashibara,K Tobimatsu,A Taketani,H Sakae,T Sumiyoshi,K Amako,Y Asano,H Osabe,F Takasaki,T Ohsugi,Y Hoshi,J Haba,J Shirai,N Sasao,D Haidt,T Tsuboyama,Toru Fukui ,M Sakuda ,Yoshihisa Takada ,Y Suzuki ,Y Arai ,T Koseki ,T Yamagata ,Y Hemmi ,S Odaka ,Y Watase ,S Sugimoto ,M Daigo ,T Nakamura ,H Kurashige ,Yoshihiro Yamada ,M Minami ,K Ogawa ,Takayuki Matsui ,Minoru Sato ,T Kamitani ,T Ohama ,J Kanzaki ,K Miyake ,N Tamura ,Akira Tsukamoto ,S Sakamoto ,Y Unno ,R Tanaka ,Takuma Yamashita ,Y Nagashima ,I Endo ,Y Ikegami ,Takashi Watanabe ,K Kubo ,Yasuo Chiba ,N Ishihara ,M Chiba ,M Higuchi ,M Fukawa ,T Kondo ,A Ono ,Sayaka Mori ,H Sakamoto ,I Nakano ,Y Fukushima ,T Emura ,Hitoshi Saitô ,M Sakano ,Y Homma ,Nobuyuki Kanematsu ,R Kikuchi ,T Hirose ,Hajime Yoshida

doi:10.1016/0370-2693(88)91784-4

A search for excited electrons in the e +e − reactions up to the √ s of 56 GeV

K Abe , M Wakai + Show 73 more

https://doi.org/10.1016/0370-2693(88)91784-4

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Journal: Physics Letters B	Publication Date: Oct 1, 1988
Citations: 5

Affiliation: Tohoku University, Kobe University, Tokyo Metropolitan University, High Energy Accelerator Research Organization, Hiroshima University, University of Tsukuba, Osaka University, Kyoto University, Tohoku Gakuin University, Tokyo University of Agriculture and Technology

#Search For Excited Electrons #Excited Electrons + Show 4 more

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Abstract

Excited electrons, e ∗'s, have been searched for by making use of the processes e +e −→e +e − γγ and e γ( e) (quasi-real Compton scattering). From the former process, we have obtained the lower limit for the mass of e ∗', 27.9 GeV/ c. A good agreement with QED is observed in the latter process, and new upper limits have been set for the coupling strength λ as a function of the mass of e ∗.

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