arXiv subjects

Anh Thu Nguyen

Publications and source records attributed to Anh Thu Nguyen.

4 recordsLinked to original sources

arXiv2023

One-loop off-shell decay $H^* \rightarrow ZZ$ at future colliders

We present one-loop formulas for contributing to the $HZZ$ vertex in 't Hooft-Veltman gauge within Standard Model framework. One-loop off-shell Higgs decay rates to $Z$-pair are investigated in both unpolarized and longitudinal polarization for $Z$ bosons in final state. The corrections are range of $7\%$ to $8.4\%$ when we vary the off-shell Higgs mass from $200$ GeV to $500$ GeV. In applications, we study off-shell Higgs decay $H^* \rightarrow ZZ$ in the Higgs productions at future colliders such as the signal processes $γ^*(Q^2)γ\rightarrow H^* \rightarrow ZZ$ and $e^-γ\rightarrow e^-H^* \rightarrow e^- ZZ$ are analyzed.

hep-ph↗

arXiv2023

One-loop formulas for off-shell decay $H^* \rightarrow W^+W^-$ in 't Hooft-Veltman gauge and its applications

We present analytic results for one-loop radiative corrections to off-shell decay $H^* \rightarrow W^+W^-$ in 't Hooft-Veltman gauge within Standard Model framework. In numerical results, we show off-shell decay rate and its corrections with varying off-shell Higgs mass. The results show that the corrections are of $10\%$ contributions to total decay rates. Furthermore, we study the impacts of one-loop radiative corrections to off-shell decay $H^* \rightarrow W^+W^-$ in Higgs processes at future colliders. The signal processes such as $e^-e^+\rightarrow ZH^*\rightarrow Z(WW)$ with including the initial beam polarizations and $e^-e^+\rightarrow ν_e\barν_e H^* \rightarrow ν_e\barν_e (WW)$ and $e^-γ\rightarrow e^-H^* \rightarrow e^-WW$ are examined. We find that the effects are visible impacts and these should be taken into account at future colliders.

hep-ph↗

arXiv2022

One-loop on-shell and off-shell decay $H^*\rightarrow VV$ at future $e^-e^-$ collider

One-loop on-shell and off-shell decays $H\rightarrow VV$ with $VV=γγ, Zγ, ZZ$ are presented in this paper. The effects of one-loop on-shell and off-shell Higgs decays in Higgs productions at $e^-e^-$ collisions are also then examined. We find that the impacts of one-loop Higgs decays are significant and they are must be taken into account at $e^-e^-$ collision.

hep-ph↗

arXiv2022

One-loop calculations for $H\rightarrow f\bar{f}γ$ in the $U(1)_{B-L}$ extension for Standard Model

In this paper, we present the calculations for $H\rightarrow f\bar{f}γ$ in the $U(1)_{B-L}$ extension for Standard Model. Analytic results for one-loop form factors in the decay process are expressed in terms of the scalar one-loop Passarino$-$Veltman functions in the conventions of {\tt LoopTools}. Therefore, the decay rates can be evaluated numerically by using this package. In phenomenological results, we show the differential decay rates with respect to invariant mass of fermion pair $m_{ff}$, new neutral gauge mass $M_{Z'}$ and the coupling $g'$ of $U(1)_{B-L}$ gauge group. We find that the contributions of the $U(1)_{B-L}$ extension for Standard Model are visible effects and they must be taken into account at future colliders.

hep-ph↗