Scale invariant extension of the Standard Model: a nightmare scenario in cosmology
Inflationary observables of a classically scale invariant model, in which the origin of the Planck mass and the electroweak scale including the right-handed neutrino mass is chiral symmetry breaking in a QCD-like hidden sector, are studied. Despite a three-field inflation the initial-value-dependenc...
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| Veröffentlicht in: | Journal of cosmology and astroparticle physics 2024-05, Vol.2024 (5), p.96 |
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| container_title | Journal of cosmology and astroparticle physics |
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| creator | Aoki, Mayumi Kubo, Jisuke Yang, Jinbo |
| description | Inflationary observables of a classically scale invariant model, in which
the origin of
the Planck mass and the electroweak scale
including the right-handed neutrino mass is
chiral symmetry breaking in a QCD-like hidden sector,
are studied.
Despite a three-field inflation the initial-value-dependence is
strongly suppressed thanks to a river-valley like potential.
The model predicts
the tensor-to-scalar ratio
r
of cosmological perturbations
smaller than that of the
R
2
inflation, i.e.,
0.0044 ≳
r
≳ 0.0017 for e-foldings between 50 and 60:
the model will be consistent even with a null detection
at LiteBird/CMB-S4. We find that
the non-Gaussianity parameter
f
NL
is
O
(10
-2
),
the same size as that of single-field inflation.
The dark matter particles are the lightest Nambu-Goldstone bosons
associated with chiral symmetry breaking, which are
decay products of one of the inflatons and
are heavier than 10
9
GeV with a strongly suppressed
coupling with the standard model,
implying that the dark matter will be
unobservable in direct as well as indirect measurements. |
| doi_str_mv | 10.1088/1475-7516/2024/05/096 |
| format | Article |
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the origin of
the Planck mass and the electroweak scale
including the right-handed neutrino mass is
chiral symmetry breaking in a QCD-like hidden sector,
are studied.
Despite a three-field inflation the initial-value-dependence is
strongly suppressed thanks to a river-valley like potential.
The model predicts
the tensor-to-scalar ratio
r
of cosmological perturbations
smaller than that of the
R
2
inflation, i.e.,
0.0044 ≳
r
≳ 0.0017 for e-foldings between 50 and 60:
the model will be consistent even with a null detection
at LiteBird/CMB-S4. We find that
the non-Gaussianity parameter
f
NL
is
O
(10
-2
),
the same size as that of single-field inflation.
The dark matter particles are the lightest Nambu-Goldstone bosons
associated with chiral symmetry breaking, which are
decay products of one of the inflatons and
are heavier than 10
9
GeV with a strongly suppressed
coupling with the standard model,
implying that the dark matter will be
unobservable in direct as well as indirect measurements.</description><identifier>ISSN: 1475-7516</identifier><identifier>EISSN: 1475-7516</identifier><identifier>DOI: 10.1088/1475-7516/2024/05/096</identifier><language>eng</language><publisher>Bristol: IOP Publishing</publisher><subject>Astronomical models ; Broken symmetry ; Cosmology ; Dark matter ; inflation ; Invariants ; Neutrinos ; non-gaussianity ; particle physics - cosmology connection ; Standard model (particle physics) ; Tensors</subject><ispartof>Journal of cosmology and astroparticle physics, 2024-05, Vol.2024 (5), p.96</ispartof><rights>2024 The Author(s)</rights><rights>2024 The Author(s). This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c351t-e4d563c4227441a78d9a33c2be6f1516d63f17d0c72f150ab9f04760ac641d1b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1475-7516/2024/05/096/pdf$$EPDF$$P50$$Giop$$Hfree_for_read</linktopdf><link.rule.ids>314,780,784,27923,27924,53845,53892</link.rule.ids></links><search><creatorcontrib>Aoki, Mayumi</creatorcontrib><creatorcontrib>Kubo, Jisuke</creatorcontrib><creatorcontrib>Yang, Jinbo</creatorcontrib><title>Scale invariant extension of the Standard Model: a nightmare scenario in cosmology</title><title>Journal of cosmology and astroparticle physics</title><addtitle>J. Cosmol. Astropart. Phys</addtitle><description>Inflationary observables of a classically scale invariant model, in which
the origin of
the Planck mass and the electroweak scale
including the right-handed neutrino mass is
chiral symmetry breaking in a QCD-like hidden sector,
are studied.
Despite a three-field inflation the initial-value-dependence is
strongly suppressed thanks to a river-valley like potential.
The model predicts
the tensor-to-scalar ratio
r
of cosmological perturbations
smaller than that of the
R
2
inflation, i.e.,
0.0044 ≳
r
≳ 0.0017 for e-foldings between 50 and 60:
the model will be consistent even with a null detection
at LiteBird/CMB-S4. We find that
the non-Gaussianity parameter
f
NL
is
O
(10
-2
),
the same size as that of single-field inflation.
The dark matter particles are the lightest Nambu-Goldstone bosons
associated with chiral symmetry breaking, which are
decay products of one of the inflatons and
are heavier than 10
9
GeV with a strongly suppressed
coupling with the standard model,
implying that the dark matter will be
unobservable in direct as well as indirect measurements.</description><subject>Astronomical models</subject><subject>Broken symmetry</subject><subject>Cosmology</subject><subject>Dark matter</subject><subject>inflation</subject><subject>Invariants</subject><subject>Neutrinos</subject><subject>non-gaussianity</subject><subject>particle physics - cosmology connection</subject><subject>Standard model (particle physics)</subject><subject>Tensors</subject><issn>1475-7516</issn><issn>1475-7516</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><recordid>eNp9kEtLAzEYRYMoWKs_QQi4cVMn70zdSfEFFcHqOqRJpp0yTcZkKvbfm6GiXYirPDj3fh8HgHOMrjAqywIzyUeSY1EQRFiBeIHG4gAMfv4P9-7H4CSlFUJEUFoOwMvM6MbB2n_oWGvfQffZOZ_q4GGoYLd0cNZpb3W08ClY11xDDX29WHZrHR1MxvmcCzkPTUjr0ITF9hQcVbpJ7uz7HIK3u9vXycNo-nz_OLmZjgzluBs5ZrmghhEiGcNalnasKTVk7kSF86JW0ApLi4wk-Y30fFwhJgXSRjBs8ZwOwcWut43hfeNSp1ZhE30eqSjiklBOaJkpvqNMDClFV6k21nn5rcJI9fpUr0b1alSvTyGusr6cu9zl6tD-Fq-Mbvcx1doqo_gP9P_6L_Adfhg</recordid><startdate>20240501</startdate><enddate>20240501</enddate><creator>Aoki, Mayumi</creator><creator>Kubo, Jisuke</creator><creator>Yang, Jinbo</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20240501</creationdate><title>Scale invariant extension of the Standard Model: a nightmare scenario in cosmology</title><author>Aoki, Mayumi ; Kubo, Jisuke ; Yang, Jinbo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c351t-e4d563c4227441a78d9a33c2be6f1516d63f17d0c72f150ab9f04760ac641d1b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Astronomical models</topic><topic>Broken symmetry</topic><topic>Cosmology</topic><topic>Dark matter</topic><topic>inflation</topic><topic>Invariants</topic><topic>Neutrinos</topic><topic>non-gaussianity</topic><topic>particle physics - cosmology connection</topic><topic>Standard model (particle physics)</topic><topic>Tensors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Aoki, Mayumi</creatorcontrib><creatorcontrib>Kubo, Jisuke</creatorcontrib><creatorcontrib>Yang, Jinbo</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><jtitle>Journal of cosmology and astroparticle physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Aoki, Mayumi</au><au>Kubo, Jisuke</au><au>Yang, Jinbo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Scale invariant extension of the Standard Model: a nightmare scenario in cosmology</atitle><jtitle>Journal of cosmology and astroparticle physics</jtitle><addtitle>J. Cosmol. Astropart. Phys</addtitle><date>2024-05-01</date><risdate>2024</risdate><volume>2024</volume><issue>5</issue><spage>96</spage><pages>96-</pages><issn>1475-7516</issn><eissn>1475-7516</eissn><abstract>Inflationary observables of a classically scale invariant model, in which
the origin of
the Planck mass and the electroweak scale
including the right-handed neutrino mass is
chiral symmetry breaking in a QCD-like hidden sector,
are studied.
Despite a three-field inflation the initial-value-dependence is
strongly suppressed thanks to a river-valley like potential.
The model predicts
the tensor-to-scalar ratio
r
of cosmological perturbations
smaller than that of the
R
2
inflation, i.e.,
0.0044 ≳
r
≳ 0.0017 for e-foldings between 50 and 60:
the model will be consistent even with a null detection
at LiteBird/CMB-S4. We find that
the non-Gaussianity parameter
f
NL
is
O
(10
-2
),
the same size as that of single-field inflation.
The dark matter particles are the lightest Nambu-Goldstone bosons
associated with chiral symmetry breaking, which are
decay products of one of the inflatons and
are heavier than 10
9
GeV with a strongly suppressed
coupling with the standard model,
implying that the dark matter will be
unobservable in direct as well as indirect measurements.</abstract><cop>Bristol</cop><pub>IOP Publishing</pub><doi>10.1088/1475-7516/2024/05/096</doi><tpages>33</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of cosmology and astroparticle physics, 2024-05, Vol.2024 (5), p.96 |
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| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Astronomical models Broken symmetry Cosmology Dark matter inflation Invariants Neutrinos non-gaussianity particle physics - cosmology connection Standard model (particle physics) Tensors |
| title | Scale invariant extension of the Standard Model: a nightmare scenario in cosmology |
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