Scrutinizing dark-matter scenarios with $B\to(K,K^*)\barνν$ decays
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| Format: | Preprint |
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2025
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| _version_ | 1866917107129647104 |
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| author | Berezhnoy, Alexander Lucha, Wolfgang Melikhov, Dmitri |
| author_facet | Berezhnoy, Alexander Lucha, Wolfgang Melikhov, Dmitri |
| contents | Conceivable explanations of Belle-II measurements of a (surprising) excess of missing-energy decays of the $B$ meson to the $K$ meson not covered by standard-model neutrino-antineutrino pairs might be offered by additional contributions of dark-matter fermion-antifermion pairs. Assuming the excessive missing-energy events to be mediated by a (generic) scalar or vector boson, a simultaneous inspection of both of the missing-energy $B$ decays into a pseudoscalar $K$ meson or a vector $K^*$ meson allows to gain information on the nature of bosons relating standard-model and dark-matter sectors, irrespective of any (unknown) dark-sector details. Upon availability of indispensable experimental data, most prominent among such insights might be the identification of the mediator spin from the differential $B$-meson decay widths. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_23210 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scrutinizing dark-matter scenarios with $B\to(K,K^*)\barνν$ decays Berezhnoy, Alexander Lucha, Wolfgang Melikhov, Dmitri High Energy Physics - Phenomenology High Energy Physics - Experiment Conceivable explanations of Belle-II measurements of a (surprising) excess of missing-energy decays of the $B$ meson to the $K$ meson not covered by standard-model neutrino-antineutrino pairs might be offered by additional contributions of dark-matter fermion-antifermion pairs. Assuming the excessive missing-energy events to be mediated by a (generic) scalar or vector boson, a simultaneous inspection of both of the missing-energy $B$ decays into a pseudoscalar $K$ meson or a vector $K^*$ meson allows to gain information on the nature of bosons relating standard-model and dark-matter sectors, irrespective of any (unknown) dark-sector details. Upon availability of indispensable experimental data, most prominent among such insights might be the identification of the mediator spin from the differential $B$-meson decay widths. |
| title | Scrutinizing dark-matter scenarios with $B\to(K,K^*)\barνν$ decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2509.23210 |