论文标题
fcnc $ b $和$ k $ meson腐烂与轻玻色粒暗物质
FCNC $B$ and $K$ Meson Decays with Light Bosonic Dark Matter
论文作者
论文摘要
我们认为$ b $和$ k $介子的衰变成伪量表或矢量梅森和缺失的能量。在SM中，这些模式源自在最终状态下具有两个中微子的风味变化中性电流（FCNC）过程。在本文中，我们考虑了这些模式上的实验上限，并将这些边界与SM预测之间的差异解释为新的光看不见粒子的窗口。特别是我们考虑一些新对称性需要成对产生的新粒子的情况。我们首先构建一般的低能效率拉格朗日耦合，将FCNC与两个暗零，一半和一个旋转的黑暗扇形颗粒耦合。然后，我们提出了可以放在这些交互作用上的约束的数值估计值，发现有效的新物理学量表从$ {\ cal o}（10）（10）$ - $ - $ {\ cal o}（10^{11}）$ gev可以探测，并且确切的值是强烈的，取决于相互作用的结构以及构成的质量。对于$ k^+ \ toπ^+ \ displayStyle {\ not} e $，我们将仅使用Na62的信号区域以及$ b^+ \ to K^+ \ displayStyle {\ not} e $ to $ q^2 $依赖于Belle II的效率。
We consider decays of $B$ and $K$ mesons into a pseudo-scalar or vector meson plus missing energy. Within the SM, these modes originate from flavor changing neutral current (FCNC) processes with two neutrinos in the final state. In this paper we consider the experimental upper bounds on these modes and interpret the difference between these bounds and the SM prediction as a window into new light invisible particles. In particular we consider the case where some new symmetry requires the new particles to be produced in pairs. We first construct the general low energy effective Lagrangian coupling an FCNC with two dark sector particles of spin zero, one-half and one. We then present numerical estimates for the constraints that can be placed on these interactions, finding that an effective new physics scale from ${\cal O}(10)$-${\cal O}(10^{11})$ GeV can be probed, with the exact value strongly depending on the interaction structure as well as the mass of the invisible particle. For $K^+\to π^+ \displaystyle{\not} E$ we incorporate into our constraints the effect of using only the signal regions of NA62, and for $B^+\to K^+ \displaystyle{\not} E$ the $q^2$-dependent efficiency of Belle II.
