Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models
Abstract We present the cross section for $$e^{+}e^{-}\rightarrow hZ$$ e + e - → h Z with arbitrary sets of electron and Z boson polarizations at the full next-to-leading order in various extended Higgs models, such as the Higgs singlet model (HSM), the inert doublet model (IDM) and the two Higgs do...
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oai:doaj.org-article:4afcbbefaff9411d943408c2737828c42021-11-14T12:13:53ZNext-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models10.1140/epjc/s10052-021-09764-81434-60441434-6052https://doaj.org/article/4afcbbefaff9411d943408c2737828c42021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09764-8https://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract We present the cross section for $$e^{+}e^{-}\rightarrow hZ$$ e + e - → h Z with arbitrary sets of electron and Z boson polarizations at the full next-to-leading order in various extended Higgs models, such as the Higgs singlet model (HSM), the inert doublet model (IDM) and the two Higgs doublet model (2HDM). We systematically perform complete one-loop calculations to the helicity amplitudes in the on-shell renormalization scheme, and present the full analytic results as well as numerical evaluations. The deviation $$\Delta R^{hZ}$$ Δ R hZ in the total cross section from its standard model (SM) prediction is comprehensively analyzed, and the differences among these models are discussed in details. We find that new physics effects appearing in the renormalized hZZ vertex almost govern the behavior of $$\Delta R^{hZ}$$ Δ R hZ , and it takes a negative value in most cases. The possible size of $$\Delta R^{hZ}$$ Δ R hZ reaches several percent under the theoretical and experimental bounds. We also analyze the deviation $$\Delta R^{hZ}_{XY}$$ Δ R XY hZ in the total cross section times decay branching ratios of the discovered Higgs boson by utilizing the H-COUP program. It is found that the four types of 2HDMs can be discriminated by analyzing the correlation between $$\Delta R^{hZ}_{\tau \tau }$$ Δ R τ τ hZ and $$\Delta R^{hZ}_{bb}$$ Δ R bb hZ and those between $$\Delta R^{hZ}_{\tau \tau }$$ Δ R τ τ hZ and $$\Delta R^{hZ}_{cc}$$ Δ R cc hZ . Furthermore, the HSM and the IDM can be discriminated from the 2HDMs by measuring $$\Delta R^{hZ}_{WW}$$ Δ R WW hZ . These signatures can be tested by precision measurements at future Higgs factories such as the International Linear Collider.Masashi AikoShinya KanemuraKentarou MawatariSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-27 (2021) |
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Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 |
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Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Masashi Aiko Shinya Kanemura Kentarou Mawatari Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models |
| description |
Abstract We present the cross section for $$e^{+}e^{-}\rightarrow hZ$$ e + e - → h Z with arbitrary sets of electron and Z boson polarizations at the full next-to-leading order in various extended Higgs models, such as the Higgs singlet model (HSM), the inert doublet model (IDM) and the two Higgs doublet model (2HDM). We systematically perform complete one-loop calculations to the helicity amplitudes in the on-shell renormalization scheme, and present the full analytic results as well as numerical evaluations. The deviation $$\Delta R^{hZ}$$ Δ R hZ in the total cross section from its standard model (SM) prediction is comprehensively analyzed, and the differences among these models are discussed in details. We find that new physics effects appearing in the renormalized hZZ vertex almost govern the behavior of $$\Delta R^{hZ}$$ Δ R hZ , and it takes a negative value in most cases. The possible size of $$\Delta R^{hZ}$$ Δ R hZ reaches several percent under the theoretical and experimental bounds. We also analyze the deviation $$\Delta R^{hZ}_{XY}$$ Δ R XY hZ in the total cross section times decay branching ratios of the discovered Higgs boson by utilizing the H-COUP program. It is found that the four types of 2HDMs can be discriminated by analyzing the correlation between $$\Delta R^{hZ}_{\tau \tau }$$ Δ R τ τ hZ and $$\Delta R^{hZ}_{bb}$$ Δ R bb hZ and those between $$\Delta R^{hZ}_{\tau \tau }$$ Δ R τ τ hZ and $$\Delta R^{hZ}_{cc}$$ Δ R cc hZ . Furthermore, the HSM and the IDM can be discriminated from the 2HDMs by measuring $$\Delta R^{hZ}_{WW}$$ Δ R WW hZ . These signatures can be tested by precision measurements at future Higgs factories such as the International Linear Collider. |
| format |
article |
| author |
Masashi Aiko Shinya Kanemura Kentarou Mawatari |
| author_facet |
Masashi Aiko Shinya Kanemura Kentarou Mawatari |
| author_sort |
Masashi Aiko |
| title |
Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models |
| title_short |
Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models |
| title_full |
Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models |
| title_fullStr |
Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models |
| title_full_unstemmed |
Next-to-leading-order corrections to the Higgs strahlung process from electron–positron collisions in extended Higgs models |
| title_sort |
next-to-leading-order corrections to the higgs strahlung process from electron–positron collisions in extended higgs models |
| publisher |
SpringerOpen |
| publishDate |
2021 |
| url |
https://doaj.org/article/4afcbbefaff9411d943408c2737828c4 |
| work_keys_str_mv |
AT masashiaiko nexttoleadingordercorrectionstothehiggsstrahlungprocessfromelectronpositroncollisionsinextendedhiggsmodels AT shinyakanemura nexttoleadingordercorrectionstothehiggsstrahlungprocessfromelectronpositroncollisionsinextendedhiggsmodels AT kentaroumawatari nexttoleadingordercorrectionstothehiggsstrahlungprocessfromelectronpositroncollisionsinextendedhiggsmodels |
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