Abstract： Using the topcolor-assisted technicolor models, we give the anomalous Wtb couplings arising from the exchange of the new gauge bosons (ETC gauge boson, colorons and Z') and calculate their contributions to the b → sγ branching ratio. We find that the contributions mainly come from colorons and the recent measured value of the b → sγ branching ratio gives a strong constraint on the masses of colorons.
YUE Chong-Xing;LU Gong-Ru;LI Wei-Bin. Anomalous Wtb Couplings and b → sγ in the Topcolor Assisted Technicolor Models[J]. 中国物理快报, 2001, 18(3): 349-351.
YUE Chong-Xing, LU Gong-Ru, LI Wei-Bin. Anomalous Wtb Couplings and b → sγ in the Topcolor Assisted Technicolor Models. Chin. Phys. Lett., 2001, 18(3): 349-351.
2001, Vol. 18 
