A Search for the Supersymmetric Chargino in $e^+ e^-$ Annihilation at {PETRA}

A search has been made for the chargino, the supersymmetric partner of theW± (or the partner of the charged Higgs bosons), ine+e− annihilation at PETRA using the JADE detector. The chargino decay modes investigated are

l\tilde v, l\bar v\tilde \gamma , q_1 \bar q_2 \tilde \gamma

and

q_1 \bar q_2 \tilde g

(with subsequent gluino decay

\tilde g \to q\bar q\tilde \gamma

). No evidence for such events has been observed. The 95% C.L. lower limit for the chargino mass is typically 22.5 GeV, depending only slightly on the masses of other supersymmetric particles. If the chargino is stable, the lower mass limit is 21.1 GeV (95% C.L.).

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
ELECTRON POSITRON: EXCLUSIVE REACTION
ELECTRON POSITRON: INCLUSIVE REACTION
POSTULATED PARTICLE: WINO
POSTULATED PARTICLE: HIGGSINO
CHARGED PARTICLE: SUPERSYMMETRY
SPARTICLE: PAIR PRODUCTION

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