A Study of single photon production in e+ e- collisions at s**(1/2) = 58-GeV with the TOPAZ detector at TRISTAN

We report a study of single photon production in e + e − collisions at s =58 GeV with the TOPAZ detector at TRISTAN. From data corresponding to an integrated luminosity of 213 pb −1 , 5 single photon candidates remained after event selection, which can be compared with the expected 3.1 ν ν γ and 2.8 background events. These results exclude the selectron mass below 47.2 GeV at the 90% confidence level, if e ̃ L and e ̃ R are mass-degenerate and the photino is massless. When combined with results from other experiments, this limit improves to 75.0 GeV.

electron positron: colliding beams
colliding beams: electron positron
photon: electroproduction
electroproduction: photon
postulated particle: selectron
mass: selectron
selectron: mass
mass: photino
photino: mass
postulated particle: photino

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