Inflectionpoint inflation in a hypercharge oriented ${\mathrm{U}\left(1\right)}_{X}$ model
Inflectionpoint inflation is an interesting possibility to realize a successful slowroll inflation when inflation is driven by a single scalar field with its value during inflation below the Planck mass (ΦI≲M _{Pl}). In order for a renormalization group (RG) improved effective λΦ ^{4} potential to develop an inflectionpoint, the running quartic coupling λ(Φ) must exhibit a minimum with an almost vanishing value in its RG evolution, namely λ(Φ _{I})≃0 and β _{λ}(ΦI)≃0, where β _{λ} is the betafunction of the quartic coupling. Here in this paper, we consider the inflectionpoint 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 inflectionpoint inflation to be consistent with the current cosmological observations, the mass ratios among the U(1) _{X} gauge boson, the righthanded 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 betweenmore »
 Authors:

^{[1]};
^{[2]};
^{[1]}
 Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy
 Yamagata Univ. (Japan). Graduate School of Science and Engineering
 Publication Date:
 Grant/Contract Number:
 SC0013680
 Type:
 Accepted Manuscript
 Journal Name:
 Physical Review D
 Additional Journal Information:
 Journal Volume: 95; Journal Issue: 5; Journal ID: ISSN 24700010
 Publisher:
 American Physical Society (APS)
 Research Org:
 Univ. of Alabama, Tuscaloosa, AL (United States)
 Sponsoring Org:
 USDOE Office of Science (SC), High Energy Physics (HEP) (SC25)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
 OSTI Identifier:
 1365638
 Alternate Identifier(s):
 OSTI ID: 1349543
Okada, Nobuchika, Okada, Satomi, and Raut, Digesh. Inflectionpoint inflation in a hypercharge oriented U(1)X model. United States: N. p.,
Web. doi:10.1103/PhysRevD.95.055030.
Okada, Nobuchika, Okada, Satomi, & Raut, Digesh. Inflectionpoint inflation in a hypercharge oriented U(1)X model. United States. doi:10.1103/PhysRevD.95.055030.
Okada, Nobuchika, Okada, Satomi, and Raut, Digesh. 2017.
"Inflectionpoint inflation in a hypercharge oriented U(1)X model". United States.
doi:10.1103/PhysRevD.95.055030. https://www.osti.gov/servlets/purl/1365638.
@article{osti_1365638,
title = {Inflectionpoint inflation in a hypercharge oriented U(1)X model},
author = {Okada, Nobuchika and Okada, Satomi and Raut, Digesh},
abstractNote = {Inflectionpoint inflation is an interesting possibility to realize a successful slowroll 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 inflectionpoint, 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 betafunction of the quartic coupling. Here in this paper, we consider the inflectionpoint 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 inflectionpoint inflation to be consistent with the current cosmological observations, the mass ratios among the U(1)X gauge boson, the righthanded 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 Run2 results on the search for a narrow resonance with the dilepton final state.},
doi = {10.1103/PhysRevD.95.055030},
journal = {Physical Review D},
number = 5,
volume = 95,
place = {United States},
year = {2017},
month = {3}
}