Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model
Abstract We propose a new physics model which has a cold dark matter candidate and can explain the b → sμ + μ − anomaly at the same time. Our model includes a scalar quark q ˜ $$ \tilde{q} $$ and a scalar lepton ℓ ˜ $$ \tilde{\ell} $$ which are SU(2) L -doublet as well as a Dirac fermion N which is...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-11-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP11(2018)054 |
| _version_ | 1829513628754116608 |
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| author | Seungwon Baek Chaehyun Yu |
| author_facet | Seungwon Baek Chaehyun Yu |
| author_sort | Seungwon Baek |
| collection | DOAJ |
| description | Abstract We propose a new physics model which has a cold dark matter candidate and can explain the b → sμ + μ − anomaly at the same time. Our model includes a scalar quark q ˜ $$ \tilde{q} $$ and a scalar lepton ℓ ˜ $$ \tilde{\ell} $$ which are SU(2) L -doublet as well as a Dirac fermion N which is SU(2) L -singlet. The new particles are charged under a gauged U(1) X group which is spontaneously broken to a discrete Z 2 symmetry by a dark scalar S. The remnant Z 2 symmetry stabilizes the dark matter. Box diagrams with q ˜ $$ \tilde{q} $$ , ℓ ˜ $$ \tilde{\ell} $$ , and N running inside the loop can generate the correct Wilson coefficients C 9 μ = − C 10 μ to accommodate the b → sμ + μ − anomaly while avoiding constraints such as B s − B ¯ s $$ {B}_s-{\overline{B}}_s $$ mixing. The dark matter annihilation into a second generation lepton pair via t-channel ℓ ˜ $$ \tilde{\ell} $$ -exchanging process plays an important role in producing the current dark matter relic abundance of the universe, showing a strong interplay between the flavor and dark matter physics. We also discuss dark-gauge-interaction-dominated and Higgs-portal-dominated scenarios for dark matter physics. |
| first_indexed | 2024-12-16T13:03:19Z |
| format | Article |
| id | doaj.art-00252e86de97429db45c7633d252a722 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-16T13:03:19Z |
| publishDate | 2018-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-00252e86de97429db45c7633d252a7222022-12-21T22:30:47ZengSpringerOpenJournal of High Energy Physics1029-84792018-11-0120181112610.1007/JHEP11(2018)054Dark matter for b → sμ + μ − anomaly in a gauged U(1) X modelSeungwon Baek0Chaehyun Yu1Department of Physics, Korea UniversityDepartment of Physics, Korea UniversityAbstract We propose a new physics model which has a cold dark matter candidate and can explain the b → sμ + μ − anomaly at the same time. Our model includes a scalar quark q ˜ $$ \tilde{q} $$ and a scalar lepton ℓ ˜ $$ \tilde{\ell} $$ which are SU(2) L -doublet as well as a Dirac fermion N which is SU(2) L -singlet. The new particles are charged under a gauged U(1) X group which is spontaneously broken to a discrete Z 2 symmetry by a dark scalar S. The remnant Z 2 symmetry stabilizes the dark matter. Box diagrams with q ˜ $$ \tilde{q} $$ , ℓ ˜ $$ \tilde{\ell} $$ , and N running inside the loop can generate the correct Wilson coefficients C 9 μ = − C 10 μ to accommodate the b → sμ + μ − anomaly while avoiding constraints such as B s − B ¯ s $$ {B}_s-{\overline{B}}_s $$ mixing. The dark matter annihilation into a second generation lepton pair via t-channel ℓ ˜ $$ \tilde{\ell} $$ -exchanging process plays an important role in producing the current dark matter relic abundance of the universe, showing a strong interplay between the flavor and dark matter physics. We also discuss dark-gauge-interaction-dominated and Higgs-portal-dominated scenarios for dark matter physics.http://link.springer.com/article/10.1007/JHEP11(2018)054Beyond Standard ModelHeavy Quark Physics |
| spellingShingle | Seungwon Baek Chaehyun Yu Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model Journal of High Energy Physics Beyond Standard Model Heavy Quark Physics |
| title | Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model |
| title_full | Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model |
| title_fullStr | Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model |
| title_full_unstemmed | Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model |
| title_short | Dark matter for b → sμ + μ − anomaly in a gauged U(1) X model |
| title_sort | dark matter for b sμ μ anomaly in a gauged u 1 x model |
| topic | Beyond Standard Model Heavy Quark Physics |
| url | http://link.springer.com/article/10.1007/JHEP11(2018)054 |
| work_keys_str_mv | AT seungwonbaek darkmatterforbsmmanomalyinagaugedu1xmodel AT chaehyunyu darkmatterforbsmmanomalyinagaugedu1xmodel |