Very light neutralino in nonminimal supersymmetric model

Kim, B.R.; Oh, S. K.; Stephan, Astrid

doi:10.1016/0370-2693(94)00922-8

Cited by 13 publications

(3 citation statements)

References 17 publications

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“…New parameters in the neutralino sector are the singlet vacuum expectation value x and the trilinear couplings λ and κ in the superpotential. 5 A scenario with a singlino-like lightest neutralino (Table 1) leads to significantly different signatures compared to the MSSM. 6 In this case the masses and mixings of the neutralinosχ 0 2,...,5 correspond toχ 0 1,...,4 of the MSSM with µ = λx.…”

Section: Nmssmmentioning

confidence: 99%

Polarization and spin effects in neutralino production and decay

Moortgat‐Pick¹,

Fraas²,

Bartl³

et al. 1999

Eur. Phys. J. C

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We study polarization and spin correlation effects in the MSSM and in extended supersymmetric models at an e + e − linear collider with polarized beams. The production of light neutralinos e + e − →χ 0 1χ 0 2 and the subsequent decayχ 0 2 →χ 0 1 e + e − including full spin correlations is compared in three supersymmetric models: MSSM, NMSSM and an E 6 -inspired model with an additional U (1) ′ gauge group. It is shown that polarization and spin effects can lead to a complete different behavior of these models. Finally, the dependence of the cross section and the decay angular distribution on the gaugino mass parameter M 1 for polarized beams is briefly outlined.

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Section: Nmssmmentioning

confidence: 99%

Polarization and spin effects in neutralino production and decay

Moortgat‐Pick¹,

Fraas²,

Bartl³

et al. 1999

Eur. Phys. J. C

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“…[13] do not restrict the other parameters of the NMSSM and do not lead to neutralino mass bounds. Kim et al [13], [14], [15] also calculate cross sections for the production of neutralinos for special values of the parameters of the NMSSM but leave the question open if and in which parameter region a massless neutralino is still compatible with experimental data.…”

Section: Introductionmentioning

confidence: 99%

Neutralino mass bounds in the Next-To-Minimal Supersymmetric Standard Model

1994

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We analyze the experimental data from the search for new particles at LEP 100 and obtain mass bounds for the neutralinos of the Next-To-Minimal Supersymmetric Standard Model (NMSSM). We find that for tan β ∼ > 5.5 a massless neutralino is still possible, while the lower mass bound for the second lightest neutralino corresponds approximately to that for the lightest neutralino in the Minimal Supersymmetric Standard Model (MSSM).

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“…The above arguments make an intensive study of the NMSSM very desirable. While the implications for supersymmetric phenomenology have already been studied to some extent [22,24,25,26], one finds, however, only incomplete lists of Feynman rules for the NMSSM in the literature [11,27,28]. Furthermore, different sign conventions for the parameters in the superpotential have been established [21,22,25].…”

Section: Introductionmentioning

confidence: 99%

Neutralinos and Higgs Bosons in the Next-To-Minimal Supersymmetric Standard Model

Franke¹,

Fraas²

1997

Int. J. Mod. Phys. A

139

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The purpose of this paper is to present a complete and consistent list of the Feynman rules for the vertices of neutralinos and Higgs bosons in the Next-To-Minimal Supersymmetric Standard Model (NMSSM), which does not yet exist in the literature. The Feynman rules are derived from the full expression for the Lagrangian and the mass matrices of the neutralinos and Higgs bosons in the NMSSM. Some crucial differences between the vertex functions of the NMSSM and the Minimal Supersymmetric Standard Model (MSSM) are discussed.

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Very light neutralino in nonminimal supersymmetric model

Cited by 13 publications

References 17 publications

Polarization and spin effects in neutralino production and decay

Polarization and spin effects in neutralino production and decay

Neutralino mass bounds in the Next-To-Minimal Supersymmetric Standard Model

Neutralinos and Higgs Bosons in the Next-To-Minimal Supersymmetric Standard Model

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