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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.19084 |
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| _version_ | 1866910949291589632 |
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| author | Hu, Quan-Yi |
| author_facet | Hu, Quan-Yi |
| contents | In this work, we study the $B^+\to K^+ E_{\mathrm{miss}}$, $B^0\to K^{*0} E_{\mathrm{miss}}$, and $Λ_b^0\to Λ^0 E_{\mathrm{miss}}$ decays under three different new physics hypotheses: the heavy new particles, the light neutral vector particles, and the axion-like particles. We find that all three hypotheses can resolve the Belle-II excess, and they can be clearly distinguished by the longitudinal polarization fraction of $K^*$. Furthermore, we discover that the longitudinal polarization fraction of $Λ$ can be used to distinguish the chirality of the effective operators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_19084 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Are the new particles heavy or light in $b \to s E_{\mathrm{miss}}$? Hu, Quan-Yi High Energy Physics - Phenomenology In this work, we study the $B^+\to K^+ E_{\mathrm{miss}}$, $B^0\to K^{*0} E_{\mathrm{miss}}$, and $Λ_b^0\to Λ^0 E_{\mathrm{miss}}$ decays under three different new physics hypotheses: the heavy new particles, the light neutral vector particles, and the axion-like particles. We find that all three hypotheses can resolve the Belle-II excess, and they can be clearly distinguished by the longitudinal polarization fraction of $K^*$. Furthermore, we discover that the longitudinal polarization fraction of $Λ$ can be used to distinguish the chirality of the effective operators. |
| title | Are the new particles heavy or light in $b \to s E_{\mathrm{miss}}$? |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.19084 |