MWTCM中PGB对Top夸克衰变的单圈修正

One-Loop Corrections to the Top-Quark Decay From PGBs in the MWTCM

在MultiscaleWalkingTechnicolor模型（MWTCM）下，计算赝标戈尔斯通玻色子（PGB）对Top夸克衰变的单圈修正，发现Top夸克的衰变宽度被极大压低．如果进一步引入Topcolor，在TopcolorassistedMWTCM中，Top夸克衰变宽度明显提高；且在参数的一定空间内，PGB修正可达到－7％，可望在实验上被观测到．

We calculate one-loop corrections to the top-quark decay width г(t→W+ b)from PGBs (Pseudo-Goldstone bosons) in the MWTCM (multiscale walking technicolor model). The cormctions are found so large that г(t→W + b) is decreased largely. If topeolor is further introduced into MWTCM, г(t→W+ b) is enhanced, and the PGBs' cormctions in the topeolor assisted MWTCM may reach -7% for certain parameters in this model, which might be observable in the experiments.