The dynamical models and the $Z \to b \bar{b}$ asymmetry}

Motivated by the $3.2 σ (1.4 σ)$ deviations between the recent experimental value for $A_{F B}^{b} (R_{b})$ and the standard model(SM) prediction, we examine the effect of new physics(NP) on the $Z b \overset{ˉ}{b}$ couplings $g_{L}^{b}$ and $g_{R}^{b}$ . First we focus our attention on the dynamical models. Then, using effective lagrangean techniques, we discuss the corrections of NP to $g_{L}^{b}$ and $g_{R}^{b}$ . We find some kinds of NP might explain the recently experimental data about $R_{b}$ and $A_{F B}^{b}$ . However, the free parameters of these kinds of NP must be severely constrained.

The dynamical models and the $Z \to b \overset{ˉ}{b}$ asymmetry}

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The dynamical models and the $Z \to b \overset{ˉ}{b}$ asymmetry}

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The dynamical models and the Z→bbˉZ→bbˉ asymmetry}

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The dynamical models and the Z→bbˉZ→bbˉ asymmetry}

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The dynamical models and the $Z \to b \overset{ˉ}{b}$ asymmetry}

讲解博客

AI智能校验

The dynamical models and the $Z \to b \overset{ˉ}{b}$ asymmetry}

讲解博客

AI智能校验