论文标题
FCNC在并发的深色光子和深色$ z $模型中
FCNC in Concurrent Dark Photon and Dark $Z$ Models
论文作者
论文摘要
在这项工作中，我们将独家$ b \差异衰减分布的可用binned数据拟合到k^{（*）} \ ell^+ \ ell^ - $和$ b_s \ $ n ϕμ^+μ^ - $ $^ - $ $^ - $ $ $ $ $衰减质量，并混合了浅色深色矢量boson模型。由于对黑暗$ z $模型对FCNC B-Meson衰减的主要贡献的评估不正确，因此文献中的一项先前的工作报告说，数据允许$ \ Mathcal {O}（1）$混合。在本次演讲中，我们使用边缘化技术报告了对混合参数的正确计算和约束。我们还从低能实验（例如原子均衡违规），$ k^+ \ toμ^+++ $ decay，$ b_s- \ overline {b} _s $混合等方面研究了其他相关界限边界。如果模型有微小的混合和深色$ z $与哑光的额外相互作用，则有些界限是放松的，而另一些则被侵犯。
In this work we fit the available binned data of the differential decay distribution of the exclusive $B \to K^{(*)} \ell^+ \ell^-$ and $B_s \to ϕμ^+ μ^-$ decays to the mass and mixing parameters of a light dark vector boson model. Due to an incorrect assessment of the dominant contribution of the dark $Z$ model to the FCNC B-meson decays, a previous work in literature reported that $\mathcal{O}(1)$ mixings were allowed by the data. In this talk we report the correct calculations and constraints on the mixing parameters as well as the mass of the dark vector boson using the marginalization technique. We also study other relevant bounds on the parameter space from low energy experiments such as the atomic parity violation, $K^+ \to μ^+ + invisible$ decay, $B_s - \overline{B}_s$ mixing etc and find that inspite of obtaining a good fit to the experimental $b \to s \ell^+ \ell^-$ data, the entire parameter space gets ruled out from some of the above bounds. In case of a model with tiny mixing and additional interaction of the dark $Z$ to the muon, some bounds are relaxed while some others are violated.
