Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders
Abstract We study the one-loop prediction for the single production of a SM-like Higgs boson in association with a photon in electron-positron collisions in the context of the two Higgs doublet type-II seesaw model (2HDMcT). We explore to what extent the new scalars in the 2HDMcT spectrum affect its...
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| Language: | English |
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SpringerOpen
2024-09-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13247-x |
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| author | B. Ait Ouazghour M. Chabab K. Goure |
| author_facet | B. Ait Ouazghour M. Chabab K. Goure |
| author_sort | B. Ait Ouazghour |
| collection | DOAJ |
| description | Abstract We study the one-loop prediction for the single production of a SM-like Higgs boson in association with a photon in electron-positron collisions in the context of the two Higgs doublet type-II seesaw model (2HDMcT). We explore to what extent the new scalars in the 2HDMcT spectrum affect its production cross-section, the ratio $$R_{\gamma h_1}$$ R γ h 1 as well as the signal strengths $$R_{\gamma Z}$$ R γ Z and $$R_{\gamma \gamma }$$ R γ γ when $$h_1$$ h 1 is identified with the observed SM Higgs boson within the 2HDMcT delimited parameter space. More specifically, we focus on $$e^+e^- \rightarrow h_1\gamma $$ e + e - → h 1 γ process at one-loop, and analyzed how it evolves under a full set of theoretical constraints and the available experimental data, including $$B\rightarrow X_s\gamma $$ B → X s γ limit at 95 $$\%$$ % C.L. Our analysis shows that these observables are strongly dependent on the parameters of the model, especially the mixing angel $$\alpha _1$$ α 1 , the potential parameters $$\lambda _{7}$$ λ 7 , $$\lambda _{9}$$ λ 9 , the trilinear Higgs couplings, with a noticeable sensitivity to $$\alpha _1$$ α 1 . We found that $$\sigma (e^+e^- \rightarrow h_1\gamma )$$ σ ( e + e - → h 1 γ ) can significantly be enhanced up to $$8.1\,\,\times 10^{-2}$$ 8.1 × 10 - 2 fb, thus exceeding the Standard Model prediction. Additionally, as a byproduct, we also observed that $$R_{\gamma h_1}$$ R γ h 1 is entirely correlated with both the $$h_1\rightarrow \gamma \gamma $$ h 1 → γ γ and $$h_1\rightarrow \gamma Z$$ h 1 → γ Z signal strengths. |
| format | Article |
| id | doaj-art-ef5c8895c7f24c899b1de3ce33e1dd4d |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-ef5c8895c7f24c899b1de3ce33e1dd4d2024-11-17T12:44:44ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-09-0184911510.1140/epjc/s10052-024-13247-xHiggs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron collidersB. Ait Ouazghour0M. Chabab1K. Goure2LPHEA, Faculty of Science Semlalia, Cadi Ayyad UniversityLPHEA, Faculty of Science Semlalia, Cadi Ayyad UniversityLPHEA, Faculty of Science Semlalia, Cadi Ayyad UniversityAbstract We study the one-loop prediction for the single production of a SM-like Higgs boson in association with a photon in electron-positron collisions in the context of the two Higgs doublet type-II seesaw model (2HDMcT). We explore to what extent the new scalars in the 2HDMcT spectrum affect its production cross-section, the ratio $$R_{\gamma h_1}$$ R γ h 1 as well as the signal strengths $$R_{\gamma Z}$$ R γ Z and $$R_{\gamma \gamma }$$ R γ γ when $$h_1$$ h 1 is identified with the observed SM Higgs boson within the 2HDMcT delimited parameter space. More specifically, we focus on $$e^+e^- \rightarrow h_1\gamma $$ e + e - → h 1 γ process at one-loop, and analyzed how it evolves under a full set of theoretical constraints and the available experimental data, including $$B\rightarrow X_s\gamma $$ B → X s γ limit at 95 $$\%$$ % C.L. Our analysis shows that these observables are strongly dependent on the parameters of the model, especially the mixing angel $$\alpha _1$$ α 1 , the potential parameters $$\lambda _{7}$$ λ 7 , $$\lambda _{9}$$ λ 9 , the trilinear Higgs couplings, with a noticeable sensitivity to $$\alpha _1$$ α 1 . We found that $$\sigma (e^+e^- \rightarrow h_1\gamma )$$ σ ( e + e - → h 1 γ ) can significantly be enhanced up to $$8.1\,\,\times 10^{-2}$$ 8.1 × 10 - 2 fb, thus exceeding the Standard Model prediction. Additionally, as a byproduct, we also observed that $$R_{\gamma h_1}$$ R γ h 1 is entirely correlated with both the $$h_1\rightarrow \gamma \gamma $$ h 1 → γ γ and $$h_1\rightarrow \gamma Z$$ h 1 → γ Z signal strengths.https://doi.org/10.1140/epjc/s10052-024-13247-x |
| spellingShingle | B. Ait Ouazghour M. Chabab K. Goure Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders European Physical Journal C: Particles and Fields |
| title | Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders |
| title_full | Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders |
| title_fullStr | Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders |
| title_full_unstemmed | Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders |
| title_short | Higgs photon associated production in a two Higgs doublet type-II seesaw model at future electron-positron colliders |
| title_sort | higgs photon associated production in a two higgs doublet type ii seesaw model at future electron positron colliders |
| url | https://doi.org/10.1140/epjc/s10052-024-13247-x |
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