Nonminimal quartic inflation in classically conformal ${\mathrm{U}\left(1\right)}_X$ extended standard model

Journal Article · 02 March 2018 · Physical Review D

DOI: https://doi.org/10.1103/physrevd.97.055001 · OSTI ID:1423504

Oda, Satsuki ^[1]; Okada, Nobuchika ^[2]; Raut, Digesh ^[2]; Takahashi, Dai-suke ^[1]

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1. Okinawa Inst. of Science and Technology Graduate University (OIST), Onna, Okinawa (Japan); Meio Univ., Nago, Okinawa (Japan). Research Inst.
2. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy

We propose quartic inflation with nonminimal gravitational coupling in the context of the classically conformal U (1)_X extension of the standard model (SM). In this model, the U(1)_X gauge symmetry is radiatively broken through the Coleman-Weinberg mechanism, by which the U(1)_X gauge boson (Z ' boson) and the right-handed Majorana neutrinos acquire their masses. We consider their masses in the range of O (10 GeV ) - O (10 TeV) , which are accessible to high-energy collider experiments. The radiative U (1)_X gauge symmetry breaking also generates a negative mass squared for the SM Higgs doublet, and the electroweak symmetry breaking occurs subsequently. We identify the U(1)_X Higgs field with inflaton and calculate the inflationary predictions. Because of the Coleman-Weinberg mechanism, the inflaton quartic coupling during inflation, which determines the inflationary predictions, is correlated to the U(1)_X gauge coupling. With this correlation, we investigate complementarities between the inflationary predictions and the current constraint from the Z' boson resonance search at the LHC Run 2 as well as the prospect of the search for the Z' boson and the right-handed neutrinos at the future collider experiments.

• Research Organization: Univ. of Alabama, Tuscaloosa, AL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: SC0012447
• OSTI ID: 1423504
• Alternate ID(s): OSTI ID: 1503884
• Journal Information: Physical Review D, Vol. 97, Issue 5; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English