Dark-matter pair production at the ILC in the littlest Higgsmodel with T-parity

作     者：乔庆鹏 徐斌 

作者机构：Department of PhysicsHenan Normal University Department of PhysicsHenan Institute of Education Department of Mathematics and Information SciencesNorth China Institute of Water Conservancy and Hydroelectric Power 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2013年第37卷第3期

页      面：16-20页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：Supported by National Natural Science Foundation of China (11075045) Foundation of He’nan Educational Committee(2011A140005) Youth Foundation of Xinxiang University (12ZC10) 

主　　题：littlest Higgs T -parity dark matter ILC 

摘      要：In the littlest Higgs model with T-parity, the heavy photon （A_H） is supposed to be a possible dark matter （DM） candidate. The direct proof of the validity of this model is to produce the heavy photon at an accelerator. In this paper, we study the production rate of e~＋ e^- → AH AH at the international e~＋ e^- linear collider （ILC） in the littlest Higgs model with T-parity, and show the distributions of the transverse momenta of A H . The numerical results indicate that the heavy photon production rate could reach the 10^-1 fb level at some parameter space, so this could be a good chance to observe the heavy photon via the pair production process with high luminosity at the ILC （500 fb^-1）. We know that DM is composed of weakly interacting massive particles, so the interactions with standard model particles are weak. How to detect heavy photons at a collider and distinguish them from other DM candidates are discussed in the final section of the paper.