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arXiv 0802.0309hep-ph
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331模型中$B_{s}^{0}-\bar{B}_{s}^{0}$混合的质量矩阵分析和约束

Mass-matrix ansatz and constraints on $B_{s}^{0}-\bar{B}_{s}^{0}$ mixing in 331 models

R. Martinez, F. Ochoa

摘要:

通过比较$B^{0}_{s}$系统质量差的理论预测值和实验测量值,我们估计了基于$SU(3)_{c} \otimes SU(3)_{L} \otimes U(1)_X$规范群的模型中$B^{0}_{s}$玻色子的质量下限.通过假设夸克质量矩阵的零纹理逼近,我们得到了测量值与标准模型理论预测值的比值以及$B^{0}_{s}$系统质量差的331个模型的$Z^{\prime}$贡献。我们发现下限的$Z^{\prime}$质量范围在1 TeV和30 TeV之间的两个最流行的331型号,和四个不同的零纹理ansätze。上述结果表示为与$b-s-Z^{\prime}$耦合相关的弱角的函数。

英文摘要:

Comparing the theoretically predicted and measured values of the mass difference of the $B^{0}_{s}$ system, we estimate the lower bound on the mass of the $Z^{\prime}$ boson of models based on the $SU(3)_{c} \otimes SU(3)_{L} \otimes U(1)_X$ 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 $Z^{\prime}$ contribution from the 331 models of the mass difference of the $B^{0}_{s}$ system. We find lower bounds on the $Z^{\prime}$ mass ranging between 1 TeV and 30 TeV for the two most popular 331 models, and four different zero-textures ansätze. The above results are expressed as a function of the weak angle associated to the $b-s-Z^{\prime}$ couplings.

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