Constraining light dark matter and mediator with $B^+ \rightarrow K^+ ν\bar ν$ data
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
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2023
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| _version_ | 1866912018394513408 |
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| author | Abdughani, Murat Reyimuaji, Yakefu |
| author_facet | Abdughani, Murat Reyimuaji, Yakefu |
| contents | We study the decay of $B^+$ meson into $K^+$ plus a light mediator $ϕ$, which subsequently decays into a dark matter pair, $\bar χχ$. Integrating constraints from DM relic density, direct detection, collider data and $B$-physics, alongside the recently reported results form Belle II experiment, we analyze the couplings between the mediator, standard model fermions, and the dark matter particles. Our results indicate that if the decay process $ϕ\rightarrow \bar χχ$ is kinematically allowed, i.e. $m_ϕ> 2m_χ$, then the mediator mass must be constrained within 0.35 GeV $\lesssim m_ϕ\lesssim$ 3 GeV. Conversely, if $m_ϕ< 2m_χ$, the mediator $m_ϕ$ is long-lived relative to the detector size, and the only allowed decay channel is $ϕ\rightarrow e^+ e^-$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_03706 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraining light dark matter and mediator with $B^+ \rightarrow K^+ ν\bar ν$ data Abdughani, Murat Reyimuaji, Yakefu High Energy Physics - Phenomenology We study the decay of $B^+$ meson into $K^+$ plus a light mediator $ϕ$, which subsequently decays into a dark matter pair, $\bar χχ$. Integrating constraints from DM relic density, direct detection, collider data and $B$-physics, alongside the recently reported results form Belle II experiment, we analyze the couplings between the mediator, standard model fermions, and the dark matter particles. Our results indicate that if the decay process $ϕ\rightarrow \bar χχ$ is kinematically allowed, i.e. $m_ϕ> 2m_χ$, then the mediator mass must be constrained within 0.35 GeV $\lesssim m_ϕ\lesssim$ 3 GeV. Conversely, if $m_ϕ< 2m_χ$, the mediator $m_ϕ$ is long-lived relative to the detector size, and the only allowed decay channel is $ϕ\rightarrow e^+ e^-$. |
| title | Constraining light dark matter and mediator with $B^+ \rightarrow K^+ ν\bar ν$ data |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2309.03706 |