Inflection-point $B-L$ Higgs inflation

Journal Article · 28 February 2017 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.95.035035 · OSTI ID:1365633

Okada, Nobuchika ^[1]; Raut, Digesh ^[1]

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1. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy

Inflection-point inflation is an interesting possibility to realize a successful slow-roll inflation when inflation is driven by a single scalar field with its initial value below the Planck mass (ΦI≲M_Pl). In order for a renormalization group (RG) improved effective λΦ⁴ potential to develop an inflection-point, the quartic coupling λ(Φ) must exhibit a minimum with an almost vanishing value in its RG evolution, namely λ(_ΦI)≃0 and β_λ(ΦI)≃0, where β_λ is the beta-function of the quartic coupling. As an example, we consider the minimal gauged B-L extended Standard Model at the TeV scale, where we identify the B-L Higgs field as the inflaton field. For a successful inflection-point inflation, which is consistent with the current cosmological observations, the mass ratios among the Z' gauge boson, the right-handed neutrinos and the B-L Higgs boson are fixed. Our scenario can be tested in the future collider experiments such as the High-Luminosity LHC and the SHiP experiments. Finally, in addition, the inflection-point inflation provides a unique prediction for the running of the spectral index α≃-2.7×10^-3($$60\atop{N}$$)² (N is the e-folding number), which can be tested in the near future.

• Research Organization: Univ. of Alabama, Tuscaloosa, AL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE
• Grant/Contract Number: SC0013680
• OSTI ID: 1365633
• Alternate ID(s): OSTI ID: 1345279
• Journal Information: Physical Review D, Vol. 95, Issue 3; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English