最小Higgs模型在ILC上可能的味改变物理迹象  

Possible Flavor Changing Signals of the Littlest Higgs Model on High-Energy Linear Collider

作　　者：岳崇兴[1] 杨硕[1] 王磊[1] 

机构地区：[1]辽宁师范大学物理与电子技术学院,大连116029

出　　处：《高能物理与核物理》2007年第3期236-239,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10475037);全国高等院校新世纪优秀人才基金(NCET-04-0290)资助~~

摘　　要：在最小Higgs(LH)模型中,由于引进了类矢量顶夸克T,对弱作用流产生了新的影响．CKM矩阵从3×3变为4×3,在树图下出现味改变中性流(FCNC)．本文研究了在国际高能直线对撞机(ILC)上能否通过e+e-→c+c和e+e-→WWveve→(c+c)veve过程探测到LH模型所预言的FCNC信号．Due to the presence of extra top quark T in the little Higgs model, the CKM matrix is not unitary and the flavor changing neutral currents may exist at the tree level. We discuss the possibility of detecting the flavor changing signals of the Littlest Higgs（LH） model at the high-energy linear e＋e- collider （ILC） via the processes e＋e- →↑ tc＋↑tc and e＋e- → （↑tc＋t↑c）ve↑ve. We find that the resonance production cross section for the process e＋e- →↑tc＋t↑c is significantly large, which can be detected in the future ILC experiment.

关 键 词：LH模型 味改变中性流(FCNC) 自由参数 

分 类 号：O572[理学—粒子物理与原子核物理]