论文标题
$ b $ - andemalies，muon $ g-2 $和中微子群众的统一框架
Unified Framework for $B$-Anomalies, Muon $g-2$, and Neutrino Masses
论文作者
论文摘要
我们提出了一个辐射性中微子肿块的模型，该模型还可以解决$ b $ -Meson衰减中报告的异常，$ r_ {d^{（\ star）}} $和$ r_ {k^{（\ star）}} $，以及Muon $ g-2 $ g-2 $ gumement，$ g-2 $ gualement，$Δa___$ $δa__$。中微子质量通过涉及TEV尺度leptokark（LQ）标量的循环图在模型中出现。适合中微子振荡参数可满足所有风味限制，这也解释了$ r_ {d^{（\ star）}} $，$ r_ {k^{（\ star）}} $和$Δ__$ nounce $ 1 \ \，σ$。 Isospin-3/2 Higgs四倍体在产生中微子肿块中起着至关重要的作用。我们指出，可以在$ s_3 $ lq的衰减中产生其中包含的双重电荷标量，从而将其覆盖范围提高到1.1（6.2）TEV，以$ \ sqrt s = 14 $ tev High-luminosity LHC（$ \ sqrt s = 100 $ tev fcc-hh）。 We also present flavor-dependent upper limits on the Yukawa couplings of the LQs to the first two family fermions, arising from non-resonant dilepton ($pp \rightarrow \ell^+ \ell^-$) processes mediated by $t$-channel LQ exchange, which for 1 TeV LQ mass, are found to be in the range $(0.15 - 0.36)$.这些限制通过LQ介导的$ b $ -Meson衰减涉及$ν_e$ $或$ν_μ$在最终状态下，这些限制排除了$ r_ {d^{（\ star）}} $的任何解释。我们还发现，相同的Yukawa耦合，负责$ΔA_μ$的手柄增强的贡献，从而为Sm Higgs对Muon和Tau成对的衰退产生了新的贡献，对相应的分支比率的修改为（2-6）％，可以在未来的Hadron colliders colliders colliders colderers colders colliders，例如HHH等。
We present a model of radiative neutrino masses which also resolves anomalies reported in $B$-meson decays, $R_{D^{(\star)}}$ and $R_{K^{(\star)}}$, as well as in muon $g-2$ measurement, $Δa_μ$. Neutrino masses arise in the model through loop diagrams involving TeV-scale leptoquark (LQ) scalars $R_2$ and $S_3$. Fits to neutrino oscillation parameters are obtained satisfying all flavor constraints which also explain the anomalies in $R_{D^{(\star)}}$, $R_{K^{(\star)}}$ and $Δa_μ$ within $1\, σ$. An isospin-3/2 Higgs quadruplet plays a crucial role in generating neutrino masses; we point out that the doubly-charged scalar contained therein can be produced in the decays of the $S_3$ LQ, which enhances its reach to 1.1 (6.2) TeV at $\sqrt s=14$ TeV high-luminosity LHC ($\sqrt s=100$ TeV FCC-hh). We also present flavor-dependent upper limits on the Yukawa couplings of the LQs to the first two family fermions, arising from non-resonant dilepton ($pp \rightarrow \ell^+ \ell^-$) processes mediated by $t$-channel LQ exchange, which for 1 TeV LQ mass, are found to be in the range $(0.15 - 0.36)$. These limits preclude any explanation of $R_{D^{(\star)}}$ through LQ-mediated $B$-meson decays involving $ν_e$ or $ν_μ$ in the final state. We also find that the same Yukawa couplings responsible for the chirally-enhanced contribution to $Δa_μ$ give rise to new contributions to the SM Higgs decays to muon and tau pairs, with the modifications to the corresponding branching ratios being at (2-6)% level, which could be tested at future hadron colliders, such as HL-LHC and FCC-hh.
