Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking
Classical scale invariance (CSI) may be one of the solutions for the hierarchy problem. Realistic models for electroweak symmetry breaking based on CSI require extended scalar sectors without mass terms, and the electroweak symmetry is broken dynamically at the quantum level by the Coleman–Weinberg...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315009004 |
| _version_ | 1818303645600448512 |
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| author | Katsuya Hashino Shinya Kanemura Yuta Orikasa |
| author_facet | Katsuya Hashino Shinya Kanemura Yuta Orikasa |
| author_sort | Katsuya Hashino |
| collection | DOAJ |
| description | Classical scale invariance (CSI) may be one of the solutions for the hierarchy problem. Realistic models for electroweak symmetry breaking based on CSI require extended scalar sectors without mass terms, and the electroweak symmetry is broken dynamically at the quantum level by the Coleman–Weinberg mechanism. We discuss discriminative features of these models. First, using the experimental value of the mass of the discovered Higgs boson h(125), we obtain an upper bound on the mass of the lightest additional scalar boson (≃543 GeV), which does not depend on its isospin and hypercharge. Second, a discriminative prediction on the Higgs-photon–photon coupling is given as a function of the number of charged scalar bosons, by which we can narrow down possible models using current and future data for the di-photon decay of h(125). Finally, for the triple Higgs boson coupling a large deviation (∼+70%) from the SM prediction is universally predicted, which is independent of masses, quantum numbers and even the number of additional scalars. These models based on CSI can be well tested at LHC Run II and at future lepton colliders. |
| first_indexed | 2024-12-13T05:58:06Z |
| format | Article |
| id | doaj.art-2b0a1f411f814ce8bdb23c8b502f50c7 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-13T05:58:06Z |
| publishDate | 2016-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-2b0a1f411f814ce8bdb23c8b502f50c72022-12-21T23:57:24ZengElsevierPhysics Letters B0370-26931873-24452016-01-01752C21722010.1016/j.physletb.2015.11.044Discriminative phenomenological features of scale invariant models for electroweak symmetry breakingKatsuya Hashino0Shinya Kanemura1Yuta Orikasa2Department of Physics, University of Toyama, 3190 Gofuku, Toyama 930-8555, JapanDepartment of Physics, University of Toyama, 3190 Gofuku, Toyama 930-8555, JapanSchool of Physics, KIAS, Seoul 130-722, Republic of KoreaClassical scale invariance (CSI) may be one of the solutions for the hierarchy problem. Realistic models for electroweak symmetry breaking based on CSI require extended scalar sectors without mass terms, and the electroweak symmetry is broken dynamically at the quantum level by the Coleman–Weinberg mechanism. We discuss discriminative features of these models. First, using the experimental value of the mass of the discovered Higgs boson h(125), we obtain an upper bound on the mass of the lightest additional scalar boson (≃543 GeV), which does not depend on its isospin and hypercharge. Second, a discriminative prediction on the Higgs-photon–photon coupling is given as a function of the number of charged scalar bosons, by which we can narrow down possible models using current and future data for the di-photon decay of h(125). Finally, for the triple Higgs boson coupling a large deviation (∼+70%) from the SM prediction is universally predicted, which is independent of masses, quantum numbers and even the number of additional scalars. These models based on CSI can be well tested at LHC Run II and at future lepton colliders.http://www.sciencedirect.com/science/article/pii/S0370269315009004 |
| spellingShingle | Katsuya Hashino Shinya Kanemura Yuta Orikasa Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking Physics Letters B |
| title | Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking |
| title_full | Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking |
| title_fullStr | Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking |
| title_full_unstemmed | Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking |
| title_short | Discriminative phenomenological features of scale invariant models for electroweak symmetry breaking |
| title_sort | discriminative phenomenological features of scale invariant models for electroweak symmetry breaking |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315009004 |
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