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LHT模型预言的新粒子在高能对撞机上的产生

发表时间:2008-04-15  浏览量:1910  下载量:810
全部作者: 刘金岩,岳崇兴,闻佳
作者单位: 辽宁师范大学物理与电子技术学院
摘 要: 小Higgs理论是超出标准模型的重要的新物理候选者,最小Higgs(LH)模型是此理论最简单的唯象新物理模型,它具有小Higgs理论的所有基本特点,但是此模型存在精细调节问题。为解决此问题,人们在LH中引入一种新的分立对称性——T宇称,从而形成了具有T宇称的LH模型。LHT模型不仅解决了LH模型的精细调节问题,而且解决了可能的暗物质候选者。因此LHT模型是非常有吸引力的一类小Higgs模型。本文讨论了LHT模型预言的新规范玻色子BH、T-odd夸克、重轻子对和标量粒子(Φ0,ΦP,Φ±)在高能对撞机上的产生。这些粒子可通过以下过程产生:e-γ→L-BH、γq→BHQ;ep→υHQH;e+e-→L-iLj及qq-→ΦVH。计算结果表明:在合理的参数空间,这些新粒子中的某些粒子能够在将来的高能对撞机上产生可观测的物理信号。此结果对正在运行或即将运行的高能对撞机实验检验小Higgs理论探测新粒子有一定的指导意义。
关 键 词: 高能物理学;LHT模型;产生截面;新粒子
Title: Production of the new particles predicted by the LHT model at high energy collider
Author: LIU Jinyan, YUE Chongxing, WEN Jia
Organization: College of Physics and Electronic Technology, Liaoning Normal University
Abstract: Little Higgs theory is proposed as an interesting solution to the so called hierarchy problem of the standard model (SM) and can be regarded as one of the important candidates for new physics beyond the SM. The littlest Higgs (LH) model is one of the simplest and phenomenological viable models, which has all essential features. However, the LH model has the fine-tuning problem. To alleviate this difficulty, a Z2 discrete symmetry, named “T parity”, is introduced into the LH model, which forms the so-called LHT model. The LHT model predicts the existence of the new particles, such as new gauge bosons, T-odd fermions, and scalars. This paper considers the production of these new particles in future high energy collider experiments. The numerical results show that, in wide range of the parameter space, some of these new particles can generate observable signals in future high energy collider experiments. The results will help to test the Little Higgs theory and further to detect new particles at present and in future high energy collider experiments.
Key words: high energy physics; the LHT model; production cross section; new particle
发表期数: 2008年8月第7期
引用格式: 刘金岩,岳崇兴,闻佳. LHT模型预言的新粒子在高能对撞机上的产生[J]. 中国科技论文在线精品论文,2008,1(7):827-833.
 
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