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Modified majoron model for cosmological anomalies

Barenboim, Gabriela; Nierste, Ulrich 1
1 Institut für Theoretische Teilchenphysik (TTP), Karlsruher Institut für Technologie (KIT)

Abstract:

The vacuum expectation value v$_{s}$ of a Higgs triplet field Δ carrying two units of lepton number L induces neutrino masses ∝v$_{s}$. The neutral component of Δ gives rise to two Higgs particles, a pseudoscalar A and a scalar S. The most general renormalizable Higgs potential V for Δ and the Standard-Model Higgs doublet Φ does not permit the possibility that the mass of either A or S is small, of order v$_{s}$, while the other mass is heavy enough to forbid the decay Z→AS to comply with LEP 1 data. We present a model with additional dimension-6 terms in V, in which this feature is absent and either A or S can be chosen light. Subsequently we propose the model as a remedy to cosmological anomalies, namely the tension between observed and predicted tensor-to-scalar mode ratios in the cosmic microwave background and the different values of the Hubble constant measured at different cosmological scales. Furthermore, if Δ dominantly couples to the third-generation doublet L$_{τ}$=(v$_{τ}$,τ), the deficit of v$_{τ}$ events at IceCube can be explained. The singly and doubly charged triplet Higgs bosons are lighter than 280 GeV and 400 GeV, respectively, and could be found at the LHC.


Verlagsausgabe §
DOI: 10.5445/IR/1000136130
Veröffentlicht am 12.08.2021
Originalveröffentlichung
DOI: 10.1103/PhysRevD.104.023013
Scopus
Zitationen: 5
Web of Science
Zitationen: 4
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2470-0010, 0556-2821, 1089-4918, 1538-4500, 1550-2368, 1550-7998, 2470-0029
KITopen-ID: 1000136130
Erschienen in Physical Review D
Verlag American Physical Society (APS)
Band 104
Heft 2
Seiten Art. Nr.: 023013
Vorab online veröffentlicht am 15.07.2021
Nachgewiesen in Dimensions
Scopus
Web of Science
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