Search for neutralinos in Z decays

Acciarri, M. ; Adam, A. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (1995) Search for neutralinos in Z decays Physics Letters B, 350 (1). pp. 109-119. ISSN 0370-2693

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We have searched for neutralinos produced via the reactions e+e → χχ′ and e+e → χ′χ′, where the next-to lightest neutralino, χ′, decays into the lightest neutralino, χ, and either a photon or a fermion pair. Based on 1.8 × 106 hadronic Z decays collected with the L3 detector at LEP, no signal has been observed. We present upper limits of a few times 10−5 on the branching ratios Z → χχ′ and Z → χ′χ′. In the framework of the Minimial Supersymmetric Standard Model, we exclude a lightest χ with mχ less than 18 GeV, if either tan β > 2 or the gluino mass m≈g > 100 GeV.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:83561
Deposited On:16 May 2012 13:46
Last Modified:16 May 2012 13:46

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