arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1702.08666hep-phhep-ex
收藏

带有调味Higgs二重态的调味Z $^{\prime}$模型中的LHCb反常和$B$物理

LHCb anomaly and $B$ physics in flavored Z$^{\prime}$ models with flavored Higgs doublets

P. Ko, Yuji Omura, Yoshihiro Shigekami, Chaehyun Yu

摘要:

我们研究了具有规范U(1)$^{\prime}$味对称性的扩展标准模型,其动机不仅是费米子质量等级,而且是由LHCb合作报告的$B \to K^{(*)} l l$中的过剩。U(1)$^{\prime}$荷以依赖于味道的方式分配给夸克和轻子,为了在可重整化水平上详细描述Yukawa耦合,还引入了味道Higgs偶联体.然后,费米子的质量等级是通过真空排列的希格斯双重态来实现的。在这个模型中,预言了U(1)$^{\prime}$的规范玻色子和Higgs二重态产生的标量的变味流,并且$B \to K^{(*)} l l$过程中的观测量可能偏离标准模型的预言.我们研究的可能性,这些新的风味变化的相互作用可以解释的过度的$B \to K^{(*)} l l$过程中,我们得到了一些预测的其他风味违反过程的基础上的分析。我们专门研究了$ΔF=2$过程和其他$B$衰变:例如,$B \to X_s γ$和$B \to D^{(*)} τν$,其中偏差由Belle和$BABAR$协作报告。

英文摘要:

We study an extended Standard Model with a gauged U(1)$^{\prime}$ flavor symmetry, motivated not only by the fermion mass hierarchy but also by the excesses in $B \to K^{(*)} l l$ reported by the LHCb collaborations. The U(1)$^{\prime}$ charges are assigned to quarks and leptons in a flavor-dependent manner, and flavored Higgs doublets are also introduced in order to detail the Yukawa couplings at the renormalizable level. Then, the fermion mass hierarchy is realized by the vacuum alignment of the Higgs doublets. In this model, flavor-changing currents involving the gauge boson of U(1)$^{\prime}$ and the scalars generated by the Higgs doublets are predicted and the observables in the $B \to K^{(*)} l l$ process possibly deviate from the Standard Model predictions. We study the possibility that these new flavor-changing interactions can explain the excesses in the $B \to K^{(*)} l l$ process, and we derive some predictions for the other flavor-violating processes based on the analysis. We specifically investigate the $ΔF=2$ processes and the other $B$ decays: e.g., $B \to X_s γ$ and $B \to D^{(*)} τν$, where the deviations are reported by the Belle and $BABAR$ collaborations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑