论文标题
风味异常的统一解释，辐射性中微子质量和Anita异常事件
Unified explanation of flavor anomalies, radiative neutrino mass and ANITA anomalous events in a vector leptoquark model
论文作者
论文摘要
在底部夸克部门违反Lepton-Faravor-Universality的最新实验提示的驱动下，我们考虑了标准模型（SM）的简单扩展，并具有附加的vector leptoquark $ v _ {\ rm lq}（\ rm lq}（{\ bf 3} dq}（{\ bf 6}，{\ bf 1}，4/3）$下的sm量规组$ su（3）_c \ times su（times su（2）_l \ times u（times u（1）_y $，以便同时解释$ b \ to $ b \ to s \ ell^+ el^+ el^+ el^ - b co c c c c c c c c c c c c y c c c. ν_l$（带有$ l = e，μ，τ$）风味异常，并通过两层辐射机构产生小中微子质量。我们对所有相关和最新的$ b \ to s \ ell^+ \ ell^ - $和$ b \ to c l^ - \barν_l$数据进行全球拟合，这是在leptoquark夫妇中主要是第二和第三代sm fermions。然后，我们查看允许的参数空间在Lepton-Favor-violation $ b $和$τ$衰减模式中的含义，例如$ b_s \ to l^+_ i l^-_ l^-_ j，\ b \ to k^{（*） μτ$和$τ\ toμγ$，$τ\ to μϕ（η^{（\ prime）}）$。通过添加Fermion Singlet $χ（{\ bf 1}，{\ bf 1}，0）$来最少扩展此模型，还解释了Anita异常的临时事件。此外，我们对高能对撞机和其他低能量实验的Leptoquark和Diquark耦合提供了互补的约束，以测试该模型。
Driven by the recent experimental hints of lepton-flavor-universality violation in the bottom-quark sector, we consider a simple extension of the Standard Model (SM) with an additional vector leptoquark $V_{\rm LQ}({\bf 3},{\bf 1},2/3)$ and a scalar diquark $S_{\rm DQ}({\bf 6},{\bf 1},4/3)$ under the SM gauge group $SU(3)_c\times SU(2)_L\times U(1)_Y$, in order to simultaneously explain the $b \to s \ell^+ \ell^-$ (with $\ell=e,μ$) and $b \to c l^- \bar ν_l$ (with $l=e,μ,τ$) flavor anomalies, as well as to generate small neutrino masses through a two-loop radiative mechanism. We perform a global fit to all the relevant and up-to-date $b \to s \ell^+ \ell^-$ and $b \to c l^- \bar ν_l$ data under the assumption that the leptoquark couples predominantly to second and third-generation SM fermions. We then look over the implications of the allowed parameter space on lepton-flavor-violating $B$ and $τ$ decay modes, such as $B_s \to l^+_i l^-_j, \ B \to K^{(*)} l^+_i l^-_j, \ B_s \to ϕl^+_i l^-_j$, $Υ(nS) \to μτ$ and $τ\to μγ$, $τ\to μϕ(η^{(\prime)})$, respectively. Minimally extending this model by adding a fermion singlet $χ({\bf 1},{\bf 1},0)$ also explains the ANITA anomalous upgoing events. Furthermore, we provide complementary constraints on leptoquark and diquark couplings from high-energy collider and other low-energy experiments to test this model.
