Dispersive Analysis of $B\to K^{(*)}$ and $B_s\to ϕ$ Form Factors
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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_ | 1866910774468804608 |
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| author | Gubernari, Nico Reboud, Méril van Dyk, Danny Virto, Javier |
| author_facet | Gubernari, Nico Reboud, Méril van Dyk, Danny Virto, Javier |
| contents | We perform the first simultaneous dispersive analysis of the $B\to K$, $B\to K^*$, and $B_s\to ϕ$ form factors. By means of an improved parametrization, we take into account the form factors' below-threshold branch cuts arising from on-shell $\bar{B}_s π^0$ and $\bar{B}_s π^0 π^0$ states, which so far have been ignored in the literature. In this way, we eliminate a source of hard-to-quantify systematic uncertainties. We provide machine-readable files to obtain the full set of the $\bar{B}\to \bar{K}^{(*)}$ and $\bar{B}_s\to ϕ$ form factors in and beyond the entire semileptonic phase space. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_06301 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Dispersive Analysis of $B\to K^{(*)}$ and $B_s\to ϕ$ Form Factors Gubernari, Nico Reboud, Méril van Dyk, Danny Virto, Javier High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice We perform the first simultaneous dispersive analysis of the $B\to K$, $B\to K^*$, and $B_s\to ϕ$ form factors. By means of an improved parametrization, we take into account the form factors' below-threshold branch cuts arising from on-shell $\bar{B}_s π^0$ and $\bar{B}_s π^0 π^0$ states, which so far have been ignored in the literature. In this way, we eliminate a source of hard-to-quantify systematic uncertainties. We provide machine-readable files to obtain the full set of the $\bar{B}\to \bar{K}^{(*)}$ and $\bar{B}_s\to ϕ$ form factors in and beyond the entire semileptonic phase space. |
| title | Dispersive Analysis of $B\to K^{(*)}$ and $B_s\to ϕ$ Form Factors |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2305.06301 |