High Energy Physics - Phenomenology
[Submitted on 27 Jan 2004
]
Title: The branching ratio $R_{b}$ in the littlest Higgs model
Title: 小Higgs模型中的分支比$R_{b}$
Abstract: In the context of the littlest Higgs(LH) model, we study the contributions of the new particles to the branching ratio $R_{b}$. We find that the contributions mainly dependent on the free parameters $f$, $c'$ and $x_{L}$. The precision measurement value of $R_{b}$ gives severe constraints on these free parameters.
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