Disentangling left and right-handed neutrino effects in $B\rightarrow K^{(*)}νν$
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| Format: | Preprint |
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2024
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| _version_ | 1866913481551249408 |
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| author | Leal, L. P. S. Rosauro-Alcaraz, S. |
| author_facet | Leal, L. P. S. Rosauro-Alcaraz, S. |
| contents | The first observation of $\mathcal{B}\left(B^+\rightarrow K^+νν\right)$ by the Belle II experiment lies almost $3σ$ away from the Standard Model expectation. In this letter we study this result in the SMEFT, extended by a light right-handed neutrino. We explore the correlations between the measured decay rate and other observables, such as $\mathcal{B}\left(B\rightarrow K^*νν\right)$ and $F_L\left(B\rightarrow K^*νν\right)$, showing that they could disentangle among scenarios involving left-handed neutrinos and those with the right-handed ones. Furthermore, we find that the high-$p_T$ tails of Drell-Yan processes studied at LHC provide important constraints that help us exclude some of the scenarios consistent with the Belle II result. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_17440 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Disentangling left and right-handed neutrino effects in $B\rightarrow K^{(*)}νν$ Leal, L. P. S. Rosauro-Alcaraz, S. High Energy Physics - Phenomenology The first observation of $\mathcal{B}\left(B^+\rightarrow K^+νν\right)$ by the Belle II experiment lies almost $3σ$ away from the Standard Model expectation. In this letter we study this result in the SMEFT, extended by a light right-handed neutrino. We explore the correlations between the measured decay rate and other observables, such as $\mathcal{B}\left(B\rightarrow K^*νν\right)$ and $F_L\left(B\rightarrow K^*νν\right)$, showing that they could disentangle among scenarios involving left-handed neutrinos and those with the right-handed ones. Furthermore, we find that the high-$p_T$ tails of Drell-Yan processes studied at LHC provide important constraints that help us exclude some of the scenarios consistent with the Belle II result. |
| title | Disentangling left and right-handed neutrino effects in $B\rightarrow K^{(*)}νν$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.17440 |