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Model Characterization and Dark Matter in the Secluded $U(1)^\prime$ Model by Hiçyılmaz, Yaşar; Selbuz, Levent; Solmaz, Levent; Ün, Cem Salih is a scholarly article available to read on EtoBox.

What is Model Characterization and Dark Matter in the Secluded $U(1)^\prime$ Model about?

We consider a class of $U(1)^\prime$-extended MSSM in which the $U(1)^{\prime}$ symmetry is broken by vacuum expectation values (VEVs) of four MSSM singlet fields. While one MSSM singlet field interacts with the MSSM Higgs fields, three of them interact only with each other in forming a secluded sector. Assigning universal $U(1)^{\prime}$ charges for three families, the anomaly cancellation condition requires exotic fields which are assumed to be heavy and decoupled. We discuss a variety of $U(1)^{\prime}$ charge assignments and anomaly cancellation, $Z^{\prime}/Z$ hierarchy, neutralinos, charginos and the Higgs sector. We find that the typical spectra involve two CP-odd Higgs bosons lighter than about 200 GeV and 600 GeV respectively, which are mostly formed by the MSSM singlet fields. If the relic density of dark matter is saturated only by a neutralino, compatible solutions predict LSP neutralinos formed by the MSSM singlet fields in the mass scales below about 600 GeV, while it is possible to realize MSSM neutralino LSP above these mass scales. One can classify the implications in three scenarios. Scenario I involves NLSP charginos, while Scenario II involves charginos which do

Author

Hiçyılmaz, Yaşar; Selbuz, Levent; Solmaz, Levent; Ün, Cem Salih

Published

2021

Language

EN