Probing signals of the littlest Higgs model via the $WW$ fusion processes at the high energy $e^{+}e^{-}$ collider

Details Probing signals of the littlest Higgs model via the $WW$ fusion processes at the high energy $e^{+}e^{-}$ collider Probing signals of the littlest Higgs model via the $WW$ fusion processes at the high energy $e^{+}e^{-}$ collider

2005-04-27

arxiv.org/abs/hep-ph/0504253v2

Eur.Phys.J.C42:331-339,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 9 figures; references added, some typos corrected; version to be published in Eur.Phys.J.C

Scientific paper

10.1140/epjc/s2005-02313-y

In the framework of the littlest Higgs($LH$) model, we consider the processes $e^{+}e^{-}\to\nu\bar{\nu}H^{0}$ and $e^{+}e^{-}\to W^{*}W^{*}\nu\bar{\nu}\to\nu\bar{\nu}t\bar{t}$, and calculate the contributions of new particles to the cross sections of these processes in the future high energy $e^{+}e^{-}$ collider($ILC$) with $\sqrt{S}=1TeV$. We find that, with reasonable values of the free parameters, the deviations of the cross sections for the processes $e^{+}e^{-}\to\nu\bar{\nu}H^{0}$ from its $SM$ value might be comparable to the future $ILC$ measurement precision. The contributions of the light Higgs boson $H^0 $ to the process $e^{+}e^{-}\to W^{*}W^{*}\nu\bar{\nu}\to\nu\bar{\nu}t\bar{t}$ are significant large in all of the parameter space preferred by the electroweak precision data, which might be detected in the future $ILC$ experiments. However, the contributions of the new gauge bosons $B_{H}$ and $Z_{H}$ to this process are very small.

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