Inflection-point inflation in a hyper-charge oriented model
- Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy
- Yamagata Univ. (Japan). Graduate School of Science and Engineering
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 value during inflation below the Planck mass (ΦI≲MPl). In order for a renormalization group (RG) improved effective λΦ4 potential to develop an inflection-point, the running quartic coupling λ(Φ) must exhibit a minimum with an almost vanishing value in its RG evolution, namely λ(ΦI)≃0 and βλ(ΦI)≃0, where βλ is the beta-function of the quartic coupling. Here in this paper, we consider the inflection-point inflation in the context of the minimal gauged U(1)X extended Standard Model (SM), which is a generalization of the minimal U(1)B$$-$$L model, and is constructed as a linear combination of the SM U(1)Y and U(1)B$$-$$L gauge symmetries. We identify the U(1)X Higgs field with the inflaton field. For a successful inflection-point inflation to be consistent with the current cosmological observations, the mass ratios among the U(1)X gauge boson, the right-handed neutrinos and the U(1)X Higgs boson are fixed. Focusing on the case that the extra U(1)X gauge symmetry is mostly aligned along the SM U(1)Y direction, we investigate a consistency between the inflationary predictions and the latest LHC Run-2 results on the search for a narrow resonance with the di-lepton final state.
- Research Organization:
- Univ. of Alabama, Tuscaloosa, AL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- SC0013680
- OSTI ID:
- 1365638
- Alternate ID(s):
- OSTI ID: 1349543
- Journal Information:
- Physical Review D, Vol. 95, Issue 5; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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