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

• Verfasst von: De Romeri, Valentina [VerfasserIn]
• Verfasst von: Niro, Viviana [VerfasserIn]
• Titel: Dark Matter and the elusive Z′ in a dynamical Inverse Seesaw scenario
• Verf.angabe: Valentina De Romeri, Enrique Fernandez-Martinez, Julia Gehrlein, Pedro A. N. Machado, and Viviana Niro
• E-Jahr: 2017
• Jahr: October 24, 2017
• Umfang: 20 S.
• Teil: volume:2017
• Teil: year:2017
• Teil: number:10
• Teil: extent:20
• Fussnoten: Gesehen am 13.09.2018
• Titel Quelle: Enthalten in: Journal of high energy physics
• Ort Quelle: Berlin : Springer, 1997
• Jahr Quelle: 2017
• Band/Heft Quelle: (2017,10) Artikel-Nummer 169, 20 Seiten
• ISSN Quelle: 1029-8479
• DOI: doi:10.1007/JHEP10(2017)169
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1580935427

Abstract

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.