K→πvv:New Contributions from Unit-Charged Scalars in Topcolor-Assisted Technicolor Models  

作　　者：XIAO Zhen-jun 肖振军(Department of Physics,He’nan Normal University,Xinxiang 453002;Department of Physics,Peking University,Beijing 100871)

机构地区：[1]Department of Physics,He’nan Normal University,Xinxiang 453002 [2]Department of Physics,Peking University,Beijing 100871

出　　处：《Chinese Physics Letters》1999年第10期712-714,共3页中国物理快报（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China under Grant No.19575015;the Outstanding Young Teacher Foundation of the Education Ministry of China;the Funds from Science and Technology Committee of He’nan Province.

摘　　要：We calculate the new contributions to the rare K-decays K^(+)→π^(+)vv and K_(L)→π^(0)vv from the unit-charged scalars appearing in the topcolor-assisted technicolor models.By using the square-root ansatz for the mixing matrices D_(L)and D_(R),we find that:(a)the new contributions from top-pionsπ^(~±)and b-pions^(~H±)dominate over that from ordinary technipionsπ1 andπs;(b)for aR^(ts*)aR^(td)=-1/4,the enhancements to the ratios B(K^(+)→π^(+)vv)and B(K_(L)→π^(0)vv)from new scalars can be as large as a factor 7 and 11,respectively;(c)the theoretical predictions are still consistent with the data after including the new contributions.

关 键 词：ordinary CONTRIBUTIONS MIXING 

分 类 号：F41[经济管理—产业经济]