Bosonic seesaw mechanism in a classically conformal extension of the Standard Model

Haba, Naoyuki; Ishida, Hiroyuki; Okada, Nobuchika; Yamaguchi, Yuya

doi:10.1016/j.physletb.2016.01.050

Title: Bosonic seesaw mechanism in a classically conformal extension of the Standard Model

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Abstract

We suggest the so-called bosonic seesaw mechanism in the context of a classically conformal U(1)B-L extension of the Standard Model with two Higgs doublet fields. The U(1)B-L symmetry is radiatively broken via the Coleman–Weinberg mechanism, which also generates the mass terms for the two Higgs doublets through quartic Higgs couplings. Their masses are all positive but, nevertheless, the electroweak symmetry breaking is realized by the bosonic seesaw mechanism. Analyzing the renormalization group evolutions for all model couplings, we find that a large hierarchy among the quartic Higgs couplings, which is crucial for the bosonic seesaw mechanism to work, is dramatically reduced toward high energies. Therefore, the bosonic seesaw is naturally realized with only a mild hierarchy, if some fundamental theory, which provides the origin of the classically conformal invariance, completes our model at some high energy, for example, the Planck scale. We identify the regions of model parameters which satisfy the perturbativity of the running couplings and the electroweak vacuum stability as well as the naturalness of the electroweak scale.

Authors:: Haba, Naoyuki; Ishida, Hiroyuki; Okada, Nobuchika; Yamaguchi, Yuya

Publication Date:: Tue Mar 01 00:00:00 EST 2016

Research Org.:: Univ. of Alabama, Tuscaloosa, AL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: Shimane University, Japan; Hokkaido University, Japan

OSTI Identifier:: 1236527

Alternate Identifier(s):: OSTI ID: 1249324; OSTI ID: 1365618

Grant/Contract Number:: SC 0013680; SC0013680; 24540272; 26247038; 15H01037; 26·2428

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 754 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Haba, Naoyuki, Ishida, Hiroyuki, Okada, Nobuchika, and Yamaguchi, Yuya. Bosonic seesaw mechanism in a classically conformal extension of the Standard Model.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2016.01.050.

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                    Haba, Naoyuki, Ishida, Hiroyuki, Okada, Nobuchika, & Yamaguchi, Yuya. Bosonic seesaw mechanism in a classically conformal extension of the Standard Model.  Netherlands.  https://doi.org/10.1016/j.physletb.2016.01.050

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                    Haba, Naoyuki, Ishida, Hiroyuki, Okada, Nobuchika, and Yamaguchi, Yuya. Tue .  
"Bosonic seesaw mechanism in a classically conformal extension of the Standard Model".  Netherlands.  https://doi.org/10.1016/j.physletb.2016.01.050.

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@article{osti_1236527,

  title        = {Bosonic seesaw mechanism in a classically conformal extension of the Standard Model},

  author       = {Haba, Naoyuki and Ishida, Hiroyuki and Okada, Nobuchika and Yamaguchi, Yuya},

  abstractNote = {We suggest the so-called bosonic seesaw mechanism in the context of a classically conformal U(1)B-L extension of the Standard Model with two Higgs doublet fields. The U(1)B-L symmetry is radiatively broken via the Coleman–Weinberg mechanism, which also generates the mass terms for the two Higgs doublets through quartic Higgs couplings. Their masses are all positive but, nevertheless, the electroweak symmetry breaking is realized by the bosonic seesaw mechanism. Analyzing the renormalization group evolutions for all model couplings, we find that a large hierarchy among the quartic Higgs couplings, which is crucial for the bosonic seesaw mechanism to work, is dramatically reduced toward high energies. Therefore, the bosonic seesaw is naturally realized with only a mild hierarchy, if some fundamental theory, which provides the origin of the classically conformal invariance, completes our model at some high energy, for example, the Planck scale. We identify the regions of model parameters which satisfy the perturbativity of the running couplings and the electroweak vacuum stability as well as the naturalness of the electroweak scale.},

  doi          = {10.1016/j.physletb.2016.01.050},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 754,

  place        = {Netherlands},

  year         = {Tue Mar 01 00:00:00 EST 2016},

  month        = {Tue Mar 01 00:00:00 EST 2016}

}

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