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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | https://arxiv.org/abs/2508.21223 |
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| _version_ | 1866917062166708224 |
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| author | Abreu, Luciano M. |
| author_facet | Abreu, Luciano M. |
| contents | In this work the production of the state $X(3872)$ is estimated via the reaction $B^0 \to K^{\ast 0} X(3872)$ through triangle mechanisms described by the sequence $B^0 \to D_s^{(*)+} (\to K^{\ast 0} D^{(*)+} ) \ D^{(*)-} \to K^{\ast 0} \ ( D^{(*)+} D^{(*)-} ) \to K^{\ast 0} X(3872) $. The molecular configuration $(D\bar D^* - c.c. )$ of the $X(3872)$ is considered. By means of the effective Lagrangian approach, the branching ratio $\mathcal{B}(B^0 \to K^{\ast 0} X(3872))$ is calculated as a function of the strength of the coupling of the charged components $(D^+\bar D^{*-} - c.c. )$ to the $X(3872)$ and compared with experimental data. Besides, employing the decay $B^0 \to K^{\ast 0} ψ(2S)$ as a normalization channel, the ratio of branching fractions $R = \frac{\mathcal{B}( B^0 \to K^{\ast 0} X(3872) )}{\mathcal{B}( B^0 \to K^{\ast 0} ψ(2S) )}\times \frac{\mathcal{B}( X(3872) \to J/ψπ^{+} π^{-} )}{\mathcal{B}( ψ(2S) \to J/ψπ^{+} π^{-} )} $ is also estimated. The findings provide another concrete example for the vital role of charged components in achieving a quantitatively correct description of the $X(3872)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_21223 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Production of the $ X(3872)$ state via the $B^0 \to K^{\ast 0} X(3872)$ decay Abreu, Luciano M. High Energy Physics - Phenomenology In this work the production of the state $X(3872)$ is estimated via the reaction $B^0 \to K^{\ast 0} X(3872)$ through triangle mechanisms described by the sequence $B^0 \to D_s^{(*)+} (\to K^{\ast 0} D^{(*)+} ) \ D^{(*)-} \to K^{\ast 0} \ ( D^{(*)+} D^{(*)-} ) \to K^{\ast 0} X(3872) $. The molecular configuration $(D\bar D^* - c.c. )$ of the $X(3872)$ is considered. By means of the effective Lagrangian approach, the branching ratio $\mathcal{B}(B^0 \to K^{\ast 0} X(3872))$ is calculated as a function of the strength of the coupling of the charged components $(D^+\bar D^{*-} - c.c. )$ to the $X(3872)$ and compared with experimental data. Besides, employing the decay $B^0 \to K^{\ast 0} ψ(2S)$ as a normalization channel, the ratio of branching fractions $R = \frac{\mathcal{B}( B^0 \to K^{\ast 0} X(3872) )}{\mathcal{B}( B^0 \to K^{\ast 0} ψ(2S) )}\times \frac{\mathcal{B}( X(3872) \to J/ψπ^{+} π^{-} )}{\mathcal{B}( ψ(2S) \to J/ψπ^{+} π^{-} )} $ is also estimated. The findings provide another concrete example for the vital role of charged components in achieving a quantitatively correct description of the $X(3872)$. |
| title | Production of the $ X(3872)$ state via the $B^0 \to K^{\ast 0} X(3872)$ decay |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2508.21223 |