Abstract： We calculate the new contributions to the rare K-decays K+→π+vv and KL →π0 vv from the unit-charged scalars appearing in the topcolor-assisted technicolor models. By using the square-root ansatz for the mixing matrices DL and DR, we find that: (a) the new contributions from top-pions π± and b-pions H± dominate over that from ordinary technipions π1 and π8; (b) for ats*RatdR = -1/4, the enhancements to the ratios B(K+→π±vv ) and B(KL →π0 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.
XIAO Zhen-jun. K →πvv: New Contributions from Unit-Charged Scalars in Topcolor-Assisted Technicolor Models[J]. 中国物理快报, 1999, 16(10): 712-714.
XIAO Zhen-jun. K →πvv: New Contributions from Unit-Charged Scalars in Topcolor-Assisted Technicolor Models. Chin. Phys. Lett., 1999, 16(10): 712-714.
1999, Vol. 16 
