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Minimal Models for Dark Matter and the Muon g-2 Anomaly
We construct models with minimal field content that can simultaneously explain the muon g − 2 anomaly and give the correct dark matter relic abundance. These models fall into two general classes, whether or not the new fields couple to the Higgs. For the general structure of models without new Higgs...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2018
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1007/JHEP07(2018)046 http://cds.cern.ch/record/2311228 |
_version_ | 1780957869777092608 |
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author | Calibbi, Lorenzo Ziegler, Robert Zupan, Jure |
author_facet | Calibbi, Lorenzo Ziegler, Robert Zupan, Jure |
author_sort | Calibbi, Lorenzo |
collection | CERN |
description | We construct models with minimal field content that can simultaneously explain the muon g − 2 anomaly and give the correct dark matter relic abundance. These models fall into two general classes, whether or not the new fields couple to the Higgs. For the general structure of models without new Higgs couplings, we provide analytical expressions that only depend on the SU(2)$_{L}$ representation. These results allow to demonstrate that only few models in this class can simultaneously explain (g − 2)$_{μ}$ and account for the relic abundance. The experimental constraints and perturbativity considerations exclude all such models, apart from a few fine-tuned regions in the parameter space, with new states in the few 100 GeV range. In the models with new Higgs couplings, the new states can be parametrically heavier by a factor $ \sqrt{1/{y}_{\mu }} $ , with y$_{μ}$ the muon Yukawa coupling, resulting in masses for the new states in the TeV regime. At present these models are not well constrained experimentally, which we illustrate on two representative examples. |
id | cern-2311228 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2018 |
record_format | invenio |
spelling | cern-23112282023-10-04T08:13:51Zdoi:10.1007/JHEP07(2018)046http://cds.cern.ch/record/2311228engCalibbi, LorenzoZiegler, RobertZupan, JureMinimal Models for Dark Matter and the Muon g-2 Anomalyhep-exParticle Physics - Experimenthep-phParticle Physics - PhenomenologyWe construct models with minimal field content that can simultaneously explain the muon g − 2 anomaly and give the correct dark matter relic abundance. These models fall into two general classes, whether or not the new fields couple to the Higgs. For the general structure of models without new Higgs couplings, we provide analytical expressions that only depend on the SU(2)$_{L}$ representation. These results allow to demonstrate that only few models in this class can simultaneously explain (g − 2)$_{μ}$ and account for the relic abundance. The experimental constraints and perturbativity considerations exclude all such models, apart from a few fine-tuned regions in the parameter space, with new states in the few 100 GeV range. In the models with new Higgs couplings, the new states can be parametrically heavier by a factor $ \sqrt{1/{y}_{\mu }} $ , with y$_{μ}$ the muon Yukawa coupling, resulting in masses for the new states in the TeV regime. At present these models are not well constrained experimentally, which we illustrate on two representative examples.We construct models with minimal field content that can simultaneously explain the muon g-2 anomaly and give the correct dark matter relic abundance. These models fall into two general classes, whether or not the new fields couple to the Higgs. For the general structure of models without new Higgs couplings, we provide analytical expressions that only depend on the $SU(2)_L$ representation. These results allow to demonstrate that only few models in this class can simultaneously explain $(g-2)_\mu$ and account for the relic abundance. The experimental constraints and perturbativity considerations exclude all such models, apart from a few fine-tuned regions in the parameter space, with new states in the few 100 GeV range. In the models with new Higgs couplings, the new states can be parametrically heavier by a factor $\sqrt{1/y_\mu}$, with $y_\mu$ the muon Yukawa coupling, resulting in masses for the new states in the TeV regime. At present these models are not well constrained experimentally, which we illustrate on two representative examples.arXiv:1804.00009CERN-TH-2018-068oai:cds.cern.ch:23112282018-03-30 |
spellingShingle | hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology Calibbi, Lorenzo Ziegler, Robert Zupan, Jure Minimal Models for Dark Matter and the Muon g-2 Anomaly |
title | Minimal Models for Dark Matter and the Muon g-2 Anomaly |
title_full | Minimal Models for Dark Matter and the Muon g-2 Anomaly |
title_fullStr | Minimal Models for Dark Matter and the Muon g-2 Anomaly |
title_full_unstemmed | Minimal Models for Dark Matter and the Muon g-2 Anomaly |
title_short | Minimal Models for Dark Matter and the Muon g-2 Anomaly |
title_sort | minimal models for dark matter and the muon g-2 anomaly |
topic | hep-ex Particle Physics - Experiment hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1007/JHEP07(2018)046 http://cds.cern.ch/record/2311228 |
work_keys_str_mv | AT calibbilorenzo minimalmodelsfordarkmatterandthemuong2anomaly AT zieglerrobert minimalmodelsfordarkmatterandthemuong2anomaly AT zupanjure minimalmodelsfordarkmatterandthemuong2anomaly |