Inflation from the Higgs field false vacuum with hybrid potential

Masina, Isabella; Notari, Alessio

doi:10.1088/1475-7516/2012/11/031

Title: Inflation from the Higgs field false vacuum with hybrid potential

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Abstract

We have recently suggested [1,2] that Inflation could have started in a local minimum of the Higgs potential at field values of about 10{sup 15}–10{sup 17} GeV, which exists for a narrow band of values of the top quark and Higgs masses and thus gives rise to a prediction on the Higgs mass to be in the range 123–129 GeV, together with a prediction on the the top mass and the cosmological tensor-to-scalar ratio r. Inflation can be achieved provided there is an additional degree of freedom which allows the transition to a radiation era. In [1] we had proposed such field to be a Brans-Dicke scalar. Here we present an alternative possibility with an additional subdominant scalar very weakly coupled to the Higgs, realizing an (inverted) hybrid Inflation scenario. Interestingly, we show that such model has an additional constraint m{sub H} < 125.3±3{sub th}, where 3{sub th} is the present theoretical uncertainty on the Standard Model RGEs. The tensor-to-scalar ratio has to be within the narrow range 10{sup −4}∼< 0.007, and values of the scalar spectral index compatible with the observed range can be obtained. Moreover, if we impose the model to have subplanckian field excursion, this selects amore »« less

Authors:

Masina, Isabella ^[1]; Notari, Alessio ^[2]

Dip. di Fisica, Università di Ferrara and INFN Sez. di Ferrara, Via Saragat 1, I-44100 Ferrara (Italy)
Departament de Física Fondamental i Institut de Ciències del Cosmos, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona (Spain)

Publication Date:: Thu Nov 01 00:00:00 EDT 2012

OSTI Identifier:: 22279816

Resource Type:: Journal Article

Journal Name:: Journal of Cosmology and Astroparticle Physics

Additional Journal Information:: Journal Volume: 2012; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANES; DEGREES OF FREEDOM; GEV RANGE; HIGGS BOSONS; HIGGS MODEL; INFLATIONARY UNIVERSE; INFLATONS; POTENTIALS; REST MASS; SCALARS; STANDARD MODEL; T QUARKS; TENSORS

Citation Formats


                    Masina, Isabella, and Notari, Alessio. Inflation from the Higgs field false vacuum with hybrid potential.  United States: N. p., 2012. 
        Web.  doi:10.1088/1475-7516/2012/11/031.

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                    Masina, Isabella, & Notari, Alessio. Inflation from the Higgs field false vacuum with hybrid potential.  United States.  https://doi.org/10.1088/1475-7516/2012/11/031

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                    Masina, Isabella, and Notari, Alessio. 2012.  
        "Inflation from the Higgs field false vacuum with hybrid potential".  United States.  https://doi.org/10.1088/1475-7516/2012/11/031.

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@article{osti_22279816,

  title        = {Inflation from the Higgs field false vacuum with hybrid potential},

  author       = {Masina, Isabella and Notari, Alessio},

  abstractNote = {We have recently suggested [1,2] that Inflation could have started in a local minimum of the Higgs potential at field values of about 10{sup 15}–10{sup 17} GeV, which exists for a narrow band of values of the top quark and Higgs masses and thus gives rise to a prediction on the Higgs mass to be in the range 123–129 GeV, together with a prediction on the the top mass and the cosmological tensor-to-scalar ratio r. Inflation can be achieved provided there is an additional degree of freedom which allows the transition to a radiation era. In [1] we had proposed such field to be a Brans-Dicke scalar. Here we present an alternative possibility with an additional subdominant scalar very weakly coupled to the Higgs, realizing an (inverted) hybrid Inflation scenario. Interestingly, we show that such model has an additional constraint m{sub H} < 125.3±3{sub th}, where 3{sub th} is the present theoretical uncertainty on the Standard Model RGEs. The tensor-to-scalar ratio has to be within the narrow range 10{sup −4}∼< 0.007, and values of the scalar spectral index compatible with the observed range can be obtained. Moreover, if we impose the model to have subplanckian field excursion, this selects a narrower range 10{sup −4}∼< 0.001 and an upper bound on the Higgs mass of about m{sub H} < 124±3{sub th}.},

  doi          = {10.1088/1475-7516/2012/11/031},

  url          = {https://www.osti.gov/biblio/22279816},
  journal      = {Journal of Cosmology and Astroparticle Physics},

  issn         = {1475-7516},

  number       = 11,

  volume       = 2012,

  place        = {United States},

  year         = {Thu Nov 01 00:00:00 EDT 2012},

  month        = {Thu Nov 01 00:00:00 EDT 2012}

}

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