Ultralight scalars in leptonic observables
Abstract Many new physics scenarios contain ultralight scalars, states which are either exactly massless or much lighter than any other massive particle in the model. Axions and majorons constitute well-motivated examples of this type of particle. In this work, we explore the phenomenology of these...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-03-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP03(2021)240 |
| _version_ | 1818415550825496576 |
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| author | Pablo Escribano Avelino Vicente |
| author_facet | Pablo Escribano Avelino Vicente |
| author_sort | Pablo Escribano |
| collection | DOAJ |
| description | Abstract Many new physics scenarios contain ultralight scalars, states which are either exactly massless or much lighter than any other massive particle in the model. Axions and majorons constitute well-motivated examples of this type of particle. In this work, we explore the phenomenology of these states in low-energy leptonic observables. After adopting a model independent approach that includes both scalar and pseudoscalar interactions, we briefly discuss the current limits on the diagonal couplings to charged leptons and consider processes in which the ultralight scalar ϕ is directly produced, such as μ → eϕ, or acts as a mediator, as in τ → μμμ. Contributions to the charged leptons magnetic and electric moments are studied as well. |
| first_indexed | 2024-12-14T11:36:47Z |
| format | Article |
| id | doaj.art-14ff5b7425e14495a874581a5d433f0e |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-14T11:36:47Z |
| publishDate | 2021-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-14ff5b7425e14495a874581a5d433f0e2022-12-21T23:02:59ZengSpringerOpenJournal of High Energy Physics1029-84792021-03-012021313710.1007/JHEP03(2021)240Ultralight scalars in leptonic observablesPablo Escribano0Avelino Vicente1Instituto de Física Corpuscular, CSIC-Universitat de ValènciaInstituto de Física Corpuscular, CSIC-Universitat de ValènciaAbstract Many new physics scenarios contain ultralight scalars, states which are either exactly massless or much lighter than any other massive particle in the model. Axions and majorons constitute well-motivated examples of this type of particle. In this work, we explore the phenomenology of these states in low-energy leptonic observables. After adopting a model independent approach that includes both scalar and pseudoscalar interactions, we briefly discuss the current limits on the diagonal couplings to charged leptons and consider processes in which the ultralight scalar ϕ is directly produced, such as μ → eϕ, or acts as a mediator, as in τ → μμμ. Contributions to the charged leptons magnetic and electric moments are studied as well.https://doi.org/10.1007/JHEP03(2021)240Beyond Standard ModelCP violationNeutrino Physics |
| spellingShingle | Pablo Escribano Avelino Vicente Ultralight scalars in leptonic observables Journal of High Energy Physics Beyond Standard Model CP violation Neutrino Physics |
| title | Ultralight scalars in leptonic observables |
| title_full | Ultralight scalars in leptonic observables |
| title_fullStr | Ultralight scalars in leptonic observables |
| title_full_unstemmed | Ultralight scalars in leptonic observables |
| title_short | Ultralight scalars in leptonic observables |
| title_sort | ultralight scalars in leptonic observables |
| topic | Beyond Standard Model CP violation Neutrino Physics |
| url | https://doi.org/10.1007/JHEP03(2021)240 |
| work_keys_str_mv | AT pabloescribano ultralightscalarsinleptonicobservables AT avelinovicente ultralightscalarsinleptonicobservables |