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Dark Matter and the elusive Z′ in a dynamical Inverse Seesaw scenario

The Inverse Seesaw naturally explains the smallness of neutrino masses via an approximate B − L symmetry broken only by a correspondingly small parameter. In this work the possible dynamical generation of the Inverse Seesaw neutrino mass mechanism from the spontaneous breaking of a gauged U(1) B − L...

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Hauptverfasser: De Romeri, Valentina (VerfasserIn) , Niro, Viviana (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: October 24, 2017
In: Journal of high energy physics
Year: 2017, Jahrgang: 2017, Heft: 10
ISSN:1029-8479
DOI:10.1007/JHEP10(2017)169
Online-Zugang:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1007/JHEP10(2017)169
Verlag, kostenfrei, Volltext: http://link.springer.com/10.1007/JHEP10(2017)169
Volltext
Verfasserangaben:Valentina De Romeri, Enrique Fernandez-Martinez, Julia Gehrlein, Pedro A. N. Machado, and Viviana Niro
Beschreibung
Zusammenfassung:The Inverse Seesaw naturally explains the smallness of neutrino masses via an approximate B − L symmetry broken only by a correspondingly small parameter. In this work the possible dynamical generation of the Inverse Seesaw neutrino mass mechanism from the spontaneous breaking of a gauged U(1) B − L symmetry is investigated. Interestingly, the Inverse Seesaw pattern requires a chiral content such that anomaly cancellation predicts the existence of extra fermions belonging to a dark sector with large, non-trivial, charges under the U(1) B − L. We investigate the phenomenology associated to these new states and find that one of them is a viable dark matter candidate with mass around the TeV scale, whose interaction with the Standard Model is mediated by the Z boson associated to the gauged U(1) B − L symmetry. Given the large charges required for anomaly cancellation in the dark sector, the B −L Z interacts preferentially with this dark sector rather than with the Standard Model. This suppresses the rate at direct detection searches and thus alleviates the constraints on Z -mediated dark matter relic abundance. The collider phenomenology of this elusive Z is also discussed.
Beschreibung:Gesehen am 13.09.2018
Beschreibung:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP10(2017)169

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