Exploring new physics in the FCNC $B_c \to D_s ν\barν$ channel
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909516978716672 |
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| author | Kumar, Tarun Mawlong, Barilang |
| author_facet | Kumar, Tarun Mawlong, Barilang |
| contents | The rare $b \to s \ell^+\ell^-$ transition is a well-explored transition, particularly for new physics beyond the standard model. Similar to this transition, another flavor changing neutral current transition $b \to s ν\barν$ involving a dineutrino pair also plays an important role in the search for new physics. The $B \to K ν\barν$ mode is one such dineutrino channel that has been analyzed in many works both within the standard model and beyond standard model framework. In this paper, we investigate the $B_c \to D_s ν\barν$ decay channel which proceeds via the $b \to s ν\barν$ transition. We consider an effective Hamiltonian framework involving new physics currents. To explore these currents further, we also analyse the decay mode within the $V_2$ leptoquark model. In our analysis, we use the form factors that have been obtained in lattice QCD calculations. We then make predictions of the $B_c \to D_s ν\barν$ branching fraction both within the standard model and beyond. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_20980 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exploring new physics in the FCNC $B_c \to D_s ν\barν$ channel Kumar, Tarun Mawlong, Barilang High Energy Physics - Phenomenology The rare $b \to s \ell^+\ell^-$ transition is a well-explored transition, particularly for new physics beyond the standard model. Similar to this transition, another flavor changing neutral current transition $b \to s ν\barν$ involving a dineutrino pair also plays an important role in the search for new physics. The $B \to K ν\barν$ mode is one such dineutrino channel that has been analyzed in many works both within the standard model and beyond standard model framework. In this paper, we investigate the $B_c \to D_s ν\barν$ decay channel which proceeds via the $b \to s ν\barν$ transition. We consider an effective Hamiltonian framework involving new physics currents. To explore these currents further, we also analyse the decay mode within the $V_2$ leptoquark model. In our analysis, we use the form factors that have been obtained in lattice QCD calculations. We then make predictions of the $B_c \to D_s ν\barν$ branching fraction both within the standard model and beyond. |
| title | Exploring new physics in the FCNC $B_c \to D_s ν\barν$ channel |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2502.20980 |