Axion-mediated dark matter and Higgs diphoton signalopen access
- Authors
- Lee, Hyun Min; Park, Myeonghun; Park, Wan-Il
- Issue Date
- Dec-2012
- Publisher
- SPRINGER
- Keywords
- Beyond Standard Model; Cosmology of Theories beyond the SM; Higgs Physics; Anomalies in Field and String Theories
- Citation
- JOURNAL OF HIGH ENERGY PHYSICS, no.12
- Journal Title
- JOURNAL OF HIGH ENERGY PHYSICS
- Number
- 12
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/50754
- DOI
- 10.1007/JHEP12(2012)037
- ISSN
- 1126-6708
1029-8479
- Abstract
- We consider axion-mediated dark matter models motivated by Fermi gamma ray line at 130 GeV, where an axion-like scalar couples to a singlet Dirac fermion dark matter (DM) so its anomaly interactions with electroweak gauge bosons allow the DM to annihilate into monochromatic photon(s). In these models, extra vector-like leptons generate the necessary anomaly interactions for the axion and can also modify the Higgs-to-diphoton rate by their Yukawa couplings to the SM Higgs boson. We can distinguish models by the branching fraction of the DM annihilation into a photon pair, favoring the model with a triplet fermion. From the condition that the lighter charged extra lepton must be heavier than dark matter for no tree-level DM annihilations, we also show that the ratio of Higgs-to-diphoton rate to the SM value is constrained by vacuum stability to 1.4(1.5) for the cutoff scale of 10(1) TeV.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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