The measurement of the $H\rightarrow \tau \tau $ signal strength in the future $e^{+}e^{-}$ Higgs factories - Archive ouverte HAL
Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2020

The measurement of the $H\rightarrow \tau \tau $ signal strength in the future $e^{+}e^{-}$ Higgs factories

Dan Yu
  • Fonction : Auteur
Manqi Ruan
  • Fonction : Auteur
Zhigang Wu
  • Fonction : Auteur
Qun Ouyang
  • Fonction : Auteur
Yue Xu
  • Fonction : Auteur
Xin Chen
  • Fonction : Auteur

Résumé

The Circular Electron Positron Collider and the International Linear Collider are two electron-positron Higgs factories. They are designed to operate at a center-of-mass energy of 240 and 250 GeV and accumulate 5.6 and 2 $ab^{-1}$ of integrated luminosity. This paper estimates their performance on the $H \rightarrow \tau ^{+}\tau ^{-}$ benchmark measurement. Using the full simulation analysis, the CEPC is expected to measure the signal strength to a relative accuracy of 0.8%. Extrapolating to the ILC setup, we conclude the ILC can reach a relative accuracy of 1.1% or 1.2%, corresponding to two benchmark beam polarization setups. The physics requirement on the mass resolution of the Higgs boson with hadronic decay final states is also discussed, showing that the CEPC baseline design and reconstruction fulfill the accuracy requirement of the $H\rightarrow \tau ^{+}\tau ^{-}$ signal strength.

Dates et versions

hal-02447890 , version 1 (21-01-2020)

Identifiants

Citer

Dan Yu, Manqi Ruan, Vincent Boudry, Henri Videau, Jean-Claude Brient, et al.. The measurement of the $H\rightarrow \tau \tau $ signal strength in the future $e^{+}e^{-}$ Higgs factories. European Physical Journal C: Particles and Fields, 2020, 80 (1), pp.7. ⟨10.1140/epjc/s10052-019-7557-y⟩. ⟨hal-02447890⟩
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