Exploring non-standard $Hb\bar{b}$ interactions at future electron-proton colliders
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911891388891136 |
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| author | Haghighat, Gholamhossein Jafari, Reza Khanpour, Hamzeh Najafabadi, Mojtaba Mohammadi |
| author_facet | Haghighat, Gholamhossein Jafari, Reza Khanpour, Hamzeh Najafabadi, Mojtaba Mohammadi |
| contents | In this paper, we use the charged-current Higgs boson production process at future electron-proton colliders, $e^-p \to H j ν_e$, with the subsequent decay of the Higgs boson into a $b\bar{b}$ pair, to probe the Standard Model effective field theory with dimension-six operators involving the Higgs boson and the bottom quark. The study is performed for two proposed future high-energy electron-proton colliders, the Large Hadron Electron Collider (LHeC) and the Future Circular Collider (FCC-he) at the center-of-mass energies of 1.3 TeV and 3.46 TeV, respectively. Constraints on the CP-even and CP-odd $Hb\bar{b}$ couplings are derived by analyzing the simulated signal and background samples. A realistic detector simulation is performed and a multivariate technique using the gradient Boosted Decision Trees algorithm is employed to discriminate the signal from background. Expected limits are obtained at $95\%$ Confidence Level for the LHeC and FCC-he assuming the integrated luminosities of 1, 2 and 10 ab$^{-1}$. We find that using 1 ab$^{-1}$ of data, the CP-even and CP-odd $Hb\bar{b}$ couplings can be constrained with accuracies of the order of $10^{-3}$ and $10^{-2}$, respectively, and a significant region of the unprobed parameter space becomes accessible. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2305_05462 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Exploring non-standard $Hb\bar{b}$ interactions at future electron-proton colliders Haghighat, Gholamhossein Jafari, Reza Khanpour, Hamzeh Najafabadi, Mojtaba Mohammadi High Energy Physics - Phenomenology In this paper, we use the charged-current Higgs boson production process at future electron-proton colliders, $e^-p \to H j ν_e$, with the subsequent decay of the Higgs boson into a $b\bar{b}$ pair, to probe the Standard Model effective field theory with dimension-six operators involving the Higgs boson and the bottom quark. The study is performed for two proposed future high-energy electron-proton colliders, the Large Hadron Electron Collider (LHeC) and the Future Circular Collider (FCC-he) at the center-of-mass energies of 1.3 TeV and 3.46 TeV, respectively. Constraints on the CP-even and CP-odd $Hb\bar{b}$ couplings are derived by analyzing the simulated signal and background samples. A realistic detector simulation is performed and a multivariate technique using the gradient Boosted Decision Trees algorithm is employed to discriminate the signal from background. Expected limits are obtained at $95\%$ Confidence Level for the LHeC and FCC-he assuming the integrated luminosities of 1, 2 and 10 ab$^{-1}$. We find that using 1 ab$^{-1}$ of data, the CP-even and CP-odd $Hb\bar{b}$ couplings can be constrained with accuracies of the order of $10^{-3}$ and $10^{-2}$, respectively, and a significant region of the unprobed parameter space becomes accessible. |
| title | Exploring non-standard $Hb\bar{b}$ interactions at future electron-proton colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2305.05462 |