Probing non-standard HVV (V = W, Z) couplings in single Higgs production at future electron-proton collider

Pramod Sharma (Indian Institute of Science Education and Research, Knowledge City, Sector 81, S.A.S. Nagar, Manauli, Punjab, PO 140306, India) ; Ambresh Shivaji (Indian Institute of Science Education and Research, Knowledge City, Sector 81, S.A.S. Nagar, Manauli, Punjab, PO 140306, India)

The couplings of the Higgs boson (H) with massive gauge bosons of weak interaction (V = W, Z), can be probed in single Higgs boson production at the proposed future Large Hadron-Electron Collider (LHeC). In the collision of an electron with a pro- ton, single Higgs production takes place via so-called charged-current (e − p → ν e Hj) and neutral-current (e − p → e − Hj) processes. We explore the potential of the azimuthal angle correlation between the forward jet and scattered neutrino or electron in probing the non-standard HVV couplings at the collider center-of-mass energy of s $$ \sqrt{s} $$ ≈ 1.3 TeV. We choose the most general modifications (of CP-even and CP-odd nature) to these couplings due to new physics effects beyond the standard model. We derive exclusion limits on new physics parameters of HV V couplings as a function of integrated luminosity at 95% C.L. using the azimuthal angular correlations in charged- and neutral-current processes. We find that using 1000 fb −1 data, the standard model-like new physics parameters in HWW and HZZ couplings can be constrained with accuracies of 4% and 15%, respectively. The least constrained CP-even parameters of HWW coupling can be as large as 0.04, while those of HZZ coupling can have values around 0.31. Allowed values of CP-odd parameters in HWW and HZZ couplings are found to be around 0.14 and 0.34, respectively. We also study changes in the allowed values of non-trivial new physics parameters in the presence of other parameters.

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      "surname": "Shivaji", 
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      "source": "Springer", 
      "value": "The couplings of the Higgs boson (H) with massive gauge bosons of weak interaction (V = W, Z), can be probed in single Higgs boson production at the proposed future Large Hadron-Electron Collider (LHeC). In the collision of an electron with a pro- ton, single Higgs production takes place via so-called charged-current (e  \u2212  p \u2192 \u03bd  e  Hj) and neutral-current (e  \u2212  p \u2192 e  \u2212  Hj) processes. We explore the potential of the azimuthal angle correlation between the forward jet and scattered neutrino or electron in probing the non-standard HVV couplings at the collider center-of-mass energy of   <math> <msqrt> <mi>s</mi> </msqrt> </math>  $$ \\sqrt{s} $$  \u2248 1.3 TeV. We choose the most general modifications (of CP-even and CP-odd nature) to these couplings due to new physics effects beyond the standard model. We derive exclusion limits on new physics parameters of HV V couplings as a function of integrated luminosity at 95% C.L. using the azimuthal angular correlations in charged- and neutral-current processes. We find that using 1000 fb  \u22121 data, the standard model-like new physics parameters in HWW and HZZ couplings can be constrained with accuracies of 4% and 15%, respectively. The least constrained CP-even parameters of HWW coupling can be as large as 0.04, while those of HZZ coupling can have values around 0.31. Allowed values of CP-odd parameters in HWW and HZZ couplings are found to be around 0.14 and 0.34, respectively. We also study changes in the allowed values of non-trivial new physics parameters in the presence of other parameters."
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Published on:
17 October 2022
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2022 (2022)
Issue 10
Pages 1-20
DOI:
https://doi.org/10.1007/JHEP10(2022)108
arXiv:
2207.03862
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: