This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP
(search for hidden particles) experiment is intended to hunt for new physics in the largely …

If R parity is only mildly violated, then the lightest supersymmetric particle (LSP) can be
stable over cosmologically time scales and still account for the dark matter relic density. We …

A hidden sector that kinetically mixes with the minimal supersymmetric standard model
provides simple and well-motivated dark matter candidates that possess many of the …

A bstract In the presence of a light singlino-like LSP in the NMSSM, the missing transverse
energy—MET—signature of squark/gluino production can be considerably reduced. Instead …

A bstract The ATLAS and CMS experiments have recently claimed discovery of a Higgs
boson-like particle at~ 5σ confidence and are beginning to test the Standard Model …

The Higgs mass implies fine-tuning for minimal theories of weak-scale supersymmetry
(SUSY). Nondecoupling effects can boost the Higgs mass when new states interact with the …

Weak-scale secluded sector dark matter can reproduce the observed dark matter relic
density with thermal freeze-out within that sector. If nature is supersymmetric, three portals to …

A bstract This paper discusses electroweak collider signatures of the NMSSM with multiple-
sector gauge mediation. We focus on the production of neutralinos and charginos which …

If supersymmetry is broken independently in multiple sectors with different scales, a number
of goldstinos will be generated. One linear combination of these goldstinos is massless and …

A bstract We study models of gauge mediated SUSY breaking with more than one hidden
sector. In these models the neutralino sector of the MSSM is supplemented with additional …