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Bednyakov, V.A.; Kovalev, A.N.
Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna (Russian Federation)
JINR rapid communications1998
Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna (Russian Federation)
JINR rapid communications1998
AbstractAbstract
[en] In Next-to-minimal Supersymmetric Standard Model (NMSSM), the Z-boson decay into two neutralinos - neutral superpartners of gauge bosons and Higgs bosons, was considered. From non-observation of the decay mode of the Z-boson one can derive some limitation on the NMSSM parameter space. With accelerator and cosmological restrictions we show that the nowadays precision of measurement of the invisible Z-boson width becomes important only in quite narrow domain of the parameter space. In this domain the extra Z-decay channel into next-to-lightest neutralino opens. The increase of the precision of the measurement of invisible Z-decay width in a factor of 10 would strongly reduce the NMSSM parameter space
Original Title
'Nevidimaya' shirina Z-bozona i ogranicheniya na supersimmetrichnoe rasshirenie standartnoj modeli s dopolnitel'nym singletnym bozonom (NMSSM)
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Joint Institute for Nuclear Research, Dubna (Russian Federation); 66 p; 1998; p. 5-14; 6 refs., 3 figs.
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