Constraining light dark matter and mediator with $B^{+}\to K^{+}\nu \bar{\nu }$ data

Murat Abdughani, Yakefu Reyimuaji

We study the decay of $B^{+}$ meson into $K^{+}$ plus a light mediator $\varphi$, which subsequently decays into a dark matter pair, $\bar{\chi }\chi$. Integrating constraints from DM relic density,…