论文标题
$ b $ - 阿纳姆在twin pati-salam风味理论中，包括2022 lhcb $ r_ {k^{（*）}} $分析
$B$-anomalies in a twin Pati-Salam theory of flavour including the 2022 LHCb $R_{K^{(*)}}$ analysis
论文作者
论文摘要
我们对Twin Pati-Salam风味理论进行了全面的现象学分析，重点是通过Vector Leptoquark $ u_1 $交换来解释$ B $ - nothemalies的参数空间。 This model provides a very predictive framework in which the $U_1$ couplings and the Yukawa couplings find a common origin via mixing of chiral quarks and leptons with vector-like fermions, providing a direct link between the $B$-anomalies and the fermion masses and mixing.我们提出并研究了一个具有三个矢量般的费米族家族的简化模型，该模型在无数的第一家族近似中，表明第二和第三家族充电了费米昂的质量和混合，并且可以同时解释$ b $ - $ - $ - $ - $。该模型具有适当的风味结构，可以与所有低能观测值兼容，并可以预测有希望的可观察物，例如$τ\rightarrow3μ$，$τ\ \右arrowμγ$和$ b \ rightarrow k^{（*）（*）}ν\ barle ii和lhcb的barv $。该模型还预测了TEV尺度尺度玻色子和矢量般的费米子的丰富光谱，所有这些都可以访问LHC。在此更新的版本中，我们包括了一个扩展分析，考虑到$ r_ {k^{（*）}} $的新2022 LHCB数据，该数据略微移动了相对于2021情况的首选参数空间。该模型仍然可以解释$ r_ {d^{（*）}} $异常在狭窄的窗口中的1 $σ$，但是我们期望将来通过LHCB协作通过更多的精确测量来测试$ r_ {k^{（*）} $比率在$ r_ {k^{（*）} $比率上的小偏差。我们还预测$ΔR_{d} =ΔR_{d^{*}} $，将来的测量结果将世界平均转换为稍小的中心值。
We perform a comprehensive phenomenological analysis of the twin Pati-Salam theory of flavour, focussing on the parameter space relevant for interpreting the $B$-anomalies via vector leptoquark $U_1$ exchange. This model provides a very predictive framework in which the $U_1$ couplings and the Yukawa couplings find a common origin via mixing of chiral quarks and leptons with vector-like fermions, providing a direct link between the $B$-anomalies and the fermion masses and mixing. We propose and study a simplified model with three vector-like fermion families, in the massless first family approximation, and show that the second and third family charged fermion masses and mixings and the $B$-anomalies can be simultaneously explained and related. The model has the proper flavour structure to be compatible with all low-energy observables, and leads to predictions in promising observables such as $τ\rightarrow3μ$, $τ\rightarrowμγ$ and $B\rightarrow K^{(*)}ν\barν$ at Belle II and LHCb. The model also predicts a rich spectrum of TeV scale gauge bosons and vector-like fermions, all accessible to the LHC. In this updated version we have included an extended analysis considering the new 2022 LHCb data on $R_{K^{(*)}}$, which has slightly shifted the preferred parameter space with respect to the 2021 case. The model can still explain the $R_{D^{(*)}}$ anomalies at 1$σ$ in a narrow window, however we expect small deviations from the SM on the $R_{K^{(*)}}$ ratios, to be tested in the future via more precise measurements by the LHCb collaboration. We also predict $ΔR_{D}= ΔR_{D^{*}}$, with future measurements shifting the world averages to slightly smaller central values.
