Precise estimate of charged Higgsino/Wino decay rate
Abstract Higgsinos and Winos in the supersymmetric Standard Model are prime candidates for dark matter due to their weakly interacting nature. The mass differences between their charged components (charginos) and neutral components (neutralinos) become degenerate when other superparticles are heavy,...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2024-03-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP03(2024)012 |
| _version_ | 1827205524373897216 |
|---|---|
| author | Masahiro Ibe Yuhei Nakayama Satoshi Shirai |
| author_facet | Masahiro Ibe Yuhei Nakayama Satoshi Shirai |
| author_sort | Masahiro Ibe |
| collection | DOAJ |
| description | Abstract Higgsinos and Winos in the supersymmetric Standard Model are prime candidates for dark matter due to their weakly interacting nature. The mass differences between their charged components (charginos) and neutral components (neutralinos) become degenerate when other superparticles are heavy, resulting in long-lived charginos. In the case of the Winos, the mass difference is approximately 160 MeV across a wide range of the parameter space. Consequently, the chargino decays into the lightest neutralino, emitting a single charged pion. For Higgsinos, however, mass differences ranging from O(0.1) GeV to O(1) GeV are possible, leading to a variety of decay channels. In this paper, we extend our previous analysis of Wino decay to the chargino with a larger mass difference. We emphasize characterizing its decay signatures through leptonic and hadronic modes. By utilizing the latest experimental data, we perform a comprehensive study of the decay rate calculations incorporating these hadronic modes to determine the impact on the predicted chargino lifetime. Additionally, we conduct next-to-leading order (NLO) calculations for the leptonic decay modes. Our NLO results can be applied to the case of more general fermionic electroweak multiplets, e.g., quintuplet dark matter. |
| first_indexed | 2024-03-07T15:23:31Z |
| format | Article |
| id | doaj.art-0d2fcc97a4504d3fa1556fe37502515a |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2025-03-21T12:09:39Z |
| publishDate | 2024-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-0d2fcc97a4504d3fa1556fe37502515a2024-06-30T11:08:35ZengSpringerOpenJournal of High Energy Physics1029-84792024-03-012024316610.1007/JHEP03(2024)012Precise estimate of charged Higgsino/Wino decay rateMasahiro Ibe0Yuhei Nakayama1Satoshi Shirai2Institute for Cosmic Ray Research (ICRR), The University of TokyoInstitute for Cosmic Ray Research (ICRR), The University of TokyoKavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of TokyoAbstract Higgsinos and Winos in the supersymmetric Standard Model are prime candidates for dark matter due to their weakly interacting nature. The mass differences between their charged components (charginos) and neutral components (neutralinos) become degenerate when other superparticles are heavy, resulting in long-lived charginos. In the case of the Winos, the mass difference is approximately 160 MeV across a wide range of the parameter space. Consequently, the chargino decays into the lightest neutralino, emitting a single charged pion. For Higgsinos, however, mass differences ranging from O(0.1) GeV to O(1) GeV are possible, leading to a variety of decay channels. In this paper, we extend our previous analysis of Wino decay to the chargino with a larger mass difference. We emphasize characterizing its decay signatures through leptonic and hadronic modes. By utilizing the latest experimental data, we perform a comprehensive study of the decay rate calculations incorporating these hadronic modes to determine the impact on the predicted chargino lifetime. Additionally, we conduct next-to-leading order (NLO) calculations for the leptonic decay modes. Our NLO results can be applied to the case of more general fermionic electroweak multiplets, e.g., quintuplet dark matter.https://doi.org/10.1007/JHEP03(2024)012Dark Matter at CollidersSupersymmetry |
| spellingShingle | Masahiro Ibe Yuhei Nakayama Satoshi Shirai Precise estimate of charged Higgsino/Wino decay rate Journal of High Energy Physics Dark Matter at Colliders Supersymmetry |
| title | Precise estimate of charged Higgsino/Wino decay rate |
| title_full | Precise estimate of charged Higgsino/Wino decay rate |
| title_fullStr | Precise estimate of charged Higgsino/Wino decay rate |
| title_full_unstemmed | Precise estimate of charged Higgsino/Wino decay rate |
| title_short | Precise estimate of charged Higgsino/Wino decay rate |
| title_sort | precise estimate of charged higgsino wino decay rate |
| topic | Dark Matter at Colliders Supersymmetry |
| url | https://doi.org/10.1007/JHEP03(2024)012 |
| work_keys_str_mv | AT masahiroibe preciseestimateofchargedhiggsinowinodecayrate AT yuheinakayama preciseestimateofchargedhiggsinowinodecayrate AT satoshishirai preciseestimateofchargedhiggsinowinodecayrate |