Flavor-violating Higgs decays and stellar cooling anomalies in axion models
Abstract We study a class of DFSZ-like models for the QCD axion that can address observed anomalies in stellar cooling. Stringent constraints from SN1987A and neutron stars are avoided by suppressed couplings to nucleons, while axion couplings to electrons and photons are sizable. All axion coupling...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-10-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP10(2021)181 |
| _version_ | 1818575832763858944 |
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| author | Marcin Badziak Giovanni Grilli di Cortona Mustafa Tabet Robert Ziegler |
| author_facet | Marcin Badziak Giovanni Grilli di Cortona Mustafa Tabet Robert Ziegler |
| author_sort | Marcin Badziak |
| collection | DOAJ |
| description | Abstract We study a class of DFSZ-like models for the QCD axion that can address observed anomalies in stellar cooling. Stringent constraints from SN1987A and neutron stars are avoided by suppressed couplings to nucleons, while axion couplings to electrons and photons are sizable. All axion couplings depend on few parameters that also control the extended Higgs sector, in particular lepton flavor-violating couplings of the Standard Model-like Higgs boson h. This allows us to correlate axion and Higgs phenomenology, and we find that BR(h → τe) can be as large as the current experimental bound of 0.22%, while BR(h → μμ) can be larger than in the Standard Model by up to 70%. Large parts of the parameter space will be tested by the next generation of axion helioscopes such as the IAXO experiment. |
| first_indexed | 2024-12-15T00:46:17Z |
| format | Article |
| id | doaj.art-e4339bf65da54bbb81f22d37bfcfbde5 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-15T00:46:17Z |
| publishDate | 2021-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-e4339bf65da54bbb81f22d37bfcfbde52022-12-21T22:41:32ZengSpringerOpenJournal of High Energy Physics1029-84792021-10-0120211013910.1007/JHEP10(2021)181Flavor-violating Higgs decays and stellar cooling anomalies in axion modelsMarcin Badziak0Giovanni Grilli di Cortona1Mustafa Tabet2Robert Ziegler3Institute of Theoretical Physics, Faculty of Physics, University of WarsawLaboratori Nazionali di Frascati, Istituto Nazionale di Fisica NucleareInstitute for Theoretical Particle Physics, Karlsruhe Institute of Technology (KIT)Institute for Theoretical Particle Physics, Karlsruhe Institute of Technology (KIT)Abstract We study a class of DFSZ-like models for the QCD axion that can address observed anomalies in stellar cooling. Stringent constraints from SN1987A and neutron stars are avoided by suppressed couplings to nucleons, while axion couplings to electrons and photons are sizable. All axion couplings depend on few parameters that also control the extended Higgs sector, in particular lepton flavor-violating couplings of the Standard Model-like Higgs boson h. This allows us to correlate axion and Higgs phenomenology, and we find that BR(h → τe) can be as large as the current experimental bound of 0.22%, while BR(h → μμ) can be larger than in the Standard Model by up to 70%. Large parts of the parameter space will be tested by the next generation of axion helioscopes such as the IAXO experiment.https://doi.org/10.1007/JHEP10(2021)181Beyond Standard ModelHiggs Physics |
| spellingShingle | Marcin Badziak Giovanni Grilli di Cortona Mustafa Tabet Robert Ziegler Flavor-violating Higgs decays and stellar cooling anomalies in axion models Journal of High Energy Physics Beyond Standard Model Higgs Physics |
| title | Flavor-violating Higgs decays and stellar cooling anomalies in axion models |
| title_full | Flavor-violating Higgs decays and stellar cooling anomalies in axion models |
| title_fullStr | Flavor-violating Higgs decays and stellar cooling anomalies in axion models |
| title_full_unstemmed | Flavor-violating Higgs decays and stellar cooling anomalies in axion models |
| title_short | Flavor-violating Higgs decays and stellar cooling anomalies in axion models |
| title_sort | flavor violating higgs decays and stellar cooling anomalies in axion models |
| topic | Beyond Standard Model Higgs Physics |
| url | https://doi.org/10.1007/JHEP10(2021)181 |
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