Relaxation of the composite Higgs little hierarchy
Abstract We describe a composite Higgs scenario in which a cosmological relaxation mechanism naturally gives rise to a hierarchy between the weak scale and the scale of spontaneous global symmetry breaking. This is achieved through the scanning of sources of explicit global symmetry breaking by a re...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-12-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP12(2017)139 |
| _version_ | 1819043753949659136 |
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| author | Brian Batell Michael A. Fedderke Lian-Tao Wang |
| author_facet | Brian Batell Michael A. Fedderke Lian-Tao Wang |
| author_sort | Brian Batell |
| collection | DOAJ |
| description | Abstract We describe a composite Higgs scenario in which a cosmological relaxation mechanism naturally gives rise to a hierarchy between the weak scale and the scale of spontaneous global symmetry breaking. This is achieved through the scanning of sources of explicit global symmetry breaking by a relaxion field during an exponentially long period of inflation in the early universe. We explore this mechanism in detail in a specific composite Higgs scenario with QCD-like dynamics, based on an ultraviolet SU(N )TC ‘technicolor’ confining gauge theory with three Dirac technifermion flavors. We find that we can successfully generate a hierarchy of scales ξ≡〈h〉2/F π 2 ≳ 1.2 × 10− 4 (i.e., compositeness scales F π ∼ 20 TeV) without tuning. This evades all current electroweak precision bounds on our (custodial violating) model. While directly observing the heavy composite states in this model will be challenging, a future electroweak precision measurement program can probe most of the natural parameter space for the model. We also highlight signatures of more general composite Higgs models in the cosmological relaxation framework, including some implications for flavor and dark matter. |
| first_indexed | 2024-12-21T10:01:48Z |
| format | Article |
| id | doaj.art-f8cf698bd62043659f8ac0a03f61e822 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-21T10:01:48Z |
| publishDate | 2017-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-f8cf698bd62043659f8ac0a03f61e8222022-12-21T19:07:56ZengSpringerOpenJournal of High Energy Physics1029-84792017-12-0120171215910.1007/JHEP12(2017)139Relaxation of the composite Higgs little hierarchyBrian Batell0Michael A. Fedderke1Lian-Tao Wang2Pittsburgh Particle Physics, Astrophysics, and Cosmology Center, Department of Physics and Astronomy, University of PittsburghDepartment of Physics, The University of ChicagoDepartment of Physics, The University of ChicagoAbstract We describe a composite Higgs scenario in which a cosmological relaxation mechanism naturally gives rise to a hierarchy between the weak scale and the scale of spontaneous global symmetry breaking. This is achieved through the scanning of sources of explicit global symmetry breaking by a relaxion field during an exponentially long period of inflation in the early universe. We explore this mechanism in detail in a specific composite Higgs scenario with QCD-like dynamics, based on an ultraviolet SU(N )TC ‘technicolor’ confining gauge theory with three Dirac technifermion flavors. We find that we can successfully generate a hierarchy of scales ξ≡〈h〉2/F π 2 ≳ 1.2 × 10− 4 (i.e., compositeness scales F π ∼ 20 TeV) without tuning. This evades all current electroweak precision bounds on our (custodial violating) model. While directly observing the heavy composite states in this model will be challenging, a future electroweak precision measurement program can probe most of the natural parameter space for the model. We also highlight signatures of more general composite Higgs models in the cosmological relaxation framework, including some implications for flavor and dark matter.http://link.springer.com/article/10.1007/JHEP12(2017)139Technicolor and Composite ModelsHiggs PhysicsBeyond Standard Model |
| spellingShingle | Brian Batell Michael A. Fedderke Lian-Tao Wang Relaxation of the composite Higgs little hierarchy Journal of High Energy Physics Technicolor and Composite Models Higgs Physics Beyond Standard Model |
| title | Relaxation of the composite Higgs little hierarchy |
| title_full | Relaxation of the composite Higgs little hierarchy |
| title_fullStr | Relaxation of the composite Higgs little hierarchy |
| title_full_unstemmed | Relaxation of the composite Higgs little hierarchy |
| title_short | Relaxation of the composite Higgs little hierarchy |
| title_sort | relaxation of the composite higgs little hierarchy |
| topic | Technicolor and Composite Models Higgs Physics Beyond Standard Model |
| url | http://link.springer.com/article/10.1007/JHEP12(2017)139 |
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