Associated Productions of HZZ and HHZ at Linear Colliders in Large Extra Dimension Model

在这篇论文，我们在两 unpolarizedand 在线性 colliders 在二过程 e~+e~- → H~0Z~0Z~0 和 e~+e~- → H~0H~0Z~0 上调查大额外的尺寸的效果极化的碰撞模式。我们发现虚拟 Kaluza-Klein graviton 交换罐头显著地为这二个过程从他们的标准模型期望提高生气的节。过程e~+e~-→ H~0Z~0Z~0 上的带的效果在有效规模女士上给予观察限制到的结果表演在 theunpolarized 和+-被探查直到 9.75 TeV 和 10.1 TeV (λ_e+= 1/2 ，λ_e-=-1/2)极化了横梁碰撞模式(与P_e+= 0.6 ， P_e-= 0.8 )分别地。为过程 e~+e~- → H~0H~0Z~0，女士上的这些限制能在 unpolarized 在 to6.06 TeV 和 6.38 TeV 上面被探查并且极化碰撞模式独立。我们发现λ _e+= 1/2，在两过程 e~+e~- → H~0Z~0Z~0 的λ _e-=-1/2 极化碰撞模式和 e~+e~- → H~0H~0Z~0 可以提供可能性在探查带的效果改进敏感。

In this paper we investigate the effects of the large extra dimensions on the two processes e＋ e-→＋ H^0 Z^0 Z^0 and e^＋e^-→ H^0H^0 Z^0 at linear colliders in both unpolarized and polarized collision modes. We find that the virtual Kaluza-Klein graviton exchange can significantly enhance the cross section from their standard model expectations for these two processes. The results show that the LED effect on the process e＋ e-→＋ H^0 Z^0 Z^0 allows the observation limits on the effective scale Ms to be probed up to 9. 75 TeV and 10.1 TeV in the unpolarized and ＋-（λe＋ =1/2, λe-= -1/2） polarized beam collision modes （with Pe＋ = 0.6, Pe-=0.8）, respectively. For the process e＋ e-→＋ H^0 H^0 Z^0, these limits on Ms can be probed up to 6.06 TeV and 6.38 TeV in the unpolarized and polarized collision modes separately. We find that the λe＋ = 1/2, λe-= -1/2 polarization collision mode in both processe＋ e-→＋ H^0 Z^0 Z^0 and e＋ e-→＋ H^0 H^0 Z^0 may provide a possibility to improve the sensitivity in probing the LED effects.