$O(α^2 G_F m^2_t)$ Contributions to $H\toγγ$

Yi Liao; Xiaoyuan Li

$O(α^2 G_F m^2_t)$ Contributions to $H\toγγ$

Yi Liao, Xiaoyuan Li

Abstract

The rare decay $H\to γγ$ is a promising detection channel for an intermediate mass Higgs boson. We compute its two-loop $O(α^2 G_F m_t^2)$ correction in the standard model and find that the relative correction to the decay rate runs between $0.7%$ and $0.5%$ for $M_H=80-150$ GeV. The analogous correction to the amplitude for $gg\to H$ is recovered as a special case. The generalization of our result to other models is also briefly indicated.

$O(α^2 G_F m^2_t)$ Contributions to $H\toγγ$

Abstract

The rare decay

is a promising detection channel for an intermediate mass Higgs boson. We compute its two-loop

correction in the standard model and find that the relative correction to the decay rate runs between

and

for

GeV. The analogous correction to the amplitude for

is recovered as a special case. The generalization of our result to other models is also briefly indicated.

$O(α^2 G_F m^2_t)$ Contributions to $H\toγγ$

Abstract

$O(α^2 G_F m^2_t)$ Contributions to $H\toγγ$

Abstract

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