The see-saw portal at future Higgs factories: the role of dimension six operators
Abstract We study an extension of the Standard Model with electroweak scale right-handed singlet fermions N that induces neutrino masses, plus a generic new physics sector at a higher scale Λ. The latter is parametrized in terms of effective operators in the language of the νSMEFT. We study its phen...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-06-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2022)077 |
| _version_ | 1797865777084235776 |
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| author | Daniele Barducci Enrico Bertuzzo |
| author_facet | Daniele Barducci Enrico Bertuzzo |
| author_sort | Daniele Barducci |
| collection | DOAJ |
| description | Abstract We study an extension of the Standard Model with electroweak scale right-handed singlet fermions N that induces neutrino masses, plus a generic new physics sector at a higher scale Λ. The latter is parametrized in terms of effective operators in the language of the νSMEFT. We study its phenomenology considering operators up to d = 6, where additional production and decay modes for N are present in addition to those arising from the mixing with the active neutrinos. We focus on the production with four-Fermi operators and we identify the most relevant additional decay modes to be N → νγ and N → 3f. We assess the sensitivity of future Higgs factories on the νSMEFT in regions of the parameter space where the new states decay promptly, displaced or are stable on detector lengths. We show that new physics scale up to 5–60 TeV can be explored, depending on the collider considered. |
| first_indexed | 2024-04-09T23:14:43Z |
| format | Article |
| id | doaj.art-f3e8b82cbdf34418955fefec37176e06 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-09T23:14:43Z |
| publishDate | 2022-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-f3e8b82cbdf34418955fefec37176e062023-03-22T10:13:04ZengSpringerOpenJournal of High Energy Physics1029-84792022-06-012022613010.1007/JHEP06(2022)077The see-saw portal at future Higgs factories: the role of dimension six operatorsDaniele Barducci0Enrico Bertuzzo1Università degli Studi di Roma la SapienzaInstituto de Fisica, Universidade de Sao PauloAbstract We study an extension of the Standard Model with electroweak scale right-handed singlet fermions N that induces neutrino masses, plus a generic new physics sector at a higher scale Λ. The latter is parametrized in terms of effective operators in the language of the νSMEFT. We study its phenomenology considering operators up to d = 6, where additional production and decay modes for N are present in addition to those arising from the mixing with the active neutrinos. We focus on the production with four-Fermi operators and we identify the most relevant additional decay modes to be N → νγ and N → 3f. We assess the sensitivity of future Higgs factories on the νSMEFT in regions of the parameter space where the new states decay promptly, displaced or are stable on detector lengths. We show that new physics scale up to 5–60 TeV can be explored, depending on the collider considered.https://doi.org/10.1007/JHEP06(2022)077Sterile or Heavy NeutrinosNew Light ParticlesOther Weak Scale BSM Models |
| spellingShingle | Daniele Barducci Enrico Bertuzzo The see-saw portal at future Higgs factories: the role of dimension six operators Journal of High Energy Physics Sterile or Heavy Neutrinos New Light Particles Other Weak Scale BSM Models |
| title | The see-saw portal at future Higgs factories: the role of dimension six operators |
| title_full | The see-saw portal at future Higgs factories: the role of dimension six operators |
| title_fullStr | The see-saw portal at future Higgs factories: the role of dimension six operators |
| title_full_unstemmed | The see-saw portal at future Higgs factories: the role of dimension six operators |
| title_short | The see-saw portal at future Higgs factories: the role of dimension six operators |
| title_sort | see saw portal at future higgs factories the role of dimension six operators |
| topic | Sterile or Heavy Neutrinos New Light Particles Other Weak Scale BSM Models |
| url | https://doi.org/10.1007/JHEP06(2022)077 |
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