| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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Axion-Like Particles and the Higgs Decays $h \rightarrow PZ$ and $h \rightarrow P \ell^{+} \ell^{-}$ |
| Zhong-Yuan An, Chong-Xing Yue**, Zhi-Cheng Liu |
Department of Physics, Liaoning Normal University, Dalian 116029
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| Cite this article: |
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Zhong-Yuan An, Chong-Xing Yue, Zhi-Cheng Liu 2018 Chin. Phys. Lett. 35 061401 |
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Abstract Axion-like particles (ALPs) are often defined as relatively light pseudoscalar particles and appear in many extensions of the Standard Model. Taking into account constraints on the free parameters from existing searches and explaining the $g$-2 deviation, we consider the contributions of ALPs with mass in the range of 1.5 GeV$\, < m_{a} < m_{h}-m_{Z}$ to the exclusive Higgs decays $h \rightarrow PZ$ and $h \rightarrow P\ell^{+} \ell^{-}$ with $P$ being the pseudoscalar mesons $\pi^{0}$, $\eta$, $\eta'$, $\eta_{c}$ and $\eta_{b}$ in a model-independent approach. We find that, in most of the parameter space range, the contributions of ALP to these decay processes are very small, while in the case of the ALP mass $m_{a}$ approximately equaling the meson mass $m_{P}$, the contributions are significantly large.
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Received: 06 March 2018
Published: 19 May 2018
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| PACS: |
14.80.Va
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(Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.))
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14.80.Bn
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(Standard-model Higgs bosons)
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13.60.Le
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(Meson production)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11275088 and 11747318. |
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