科研之友
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摘要
Comparing the theoretically predicted and measured values of the mass difference of the B-s(0) system, we estimate the lower bound on the mass of the Z' boson of models based on the SU(3)(c) circle times SU(3)L circle times U (1)X gauge group. By assuming zero-texture approaches of the quark mass matrices, we find the ratio of the measured value to the theoretical prediction from the standard model and the Z' contribution from the 331 models of the mass difference of the B-s(0) system. We find lower bounds on the Z' mass ranging between 1 TeV and 30 TeV for the two most popular 331 models, and four different zero-textures ansatze. The above results are expressed as a function of the weak angle associated to the b - s - Z' couplings.
- 出版日期2008-3
