We study unconventional signatures of the NMSSM (the MSSM with an additional gauge singlet) with a singlino LSP. Compared to sparticle production processes in the MSSM, these consist in additional cascades (one or two additional l + l − , τ + τ − or b ¯ b pairs or pho-tons), possibly with macroscopically displaced vertices with distances varying from millimeters to several meters.

The B s-¯ B s mixing parameter ∆M s is studied in the MSSM with large tan β. The recent Tevatron measurement of ∆M s is used to constrain the MSSM parameter space. From this analysis the often neglected contribution to ∆M s from the operator Q SLL 1

A bstract Extensions of the minimal supersymmetric standard model (MSSM) gauge group abound in literature. Several these include an additional U(1) X group. Chiral fermions’ charge assignments under are constrained to cancel local anomalies extension and they determine structure phenomenology it. We provide all anomaly-free up a maximum absolute Q max = 10, assuming that chiral superfield conte...

The prospects for discovering neutral Higgs bosons in the minimal supersymmetric model (MSSM) and in the minimal supergravity model (MSUGRA) at the LHC are investigated. Two special discovery channels are discussed: (i) the photon pair decay of the MSSM CP-odd Higgs boson, and (ii) the muon pair decays of neutral Higgs bosons and in the MSUGRA.

We present a calculation of the QCD correction factors η2B and η2K up to Next–to–Leading Order within the MSSM. We took into account the region of low tanβ for the Higgs– and chargino sector while neglecting the effect of gluinos and neutralinos. Key–words: Mixing; MSSM; CP-violation; CKM-matrix

1 This talk summarizes topical theoretical work for tests of the electroweak standard model and of the minimal supersymmetric standard model (MSSM). The status of the standard model and the MSSM is discussed in view of recent precision data. A brief theoretical summary of the Working Group on Elec-troweak Interactions is included.

We consider instant preheating as the mechanism for generating the curvature perturbation at the end of chaotic inflation. Then we examine if inflation could be driven by a Minimal Supersymmetric Standard Model (MSSM) flat direction or a sneutrino. Our simple mechanism relaxes some serious constraints that appeared in past studies, making inflation driven by a MSSM flat direction or a sneutrino...

The Higgs boson search has shifted from LEP2 to the Tevatron and will subsequently move to the LHC. The current limits from the Tevatron and the prospective sensitivities at the LHC are often interpreted in specific MSSM scenarios. For heavy Higgs boson production and subsequent decay into bb̄ or ττ, the present Tevatron data allow to set limits in the MA–tan β plane for small MA and large tanβ ...