Properties of the tensor state $bc\overline{b}\overline{c}$
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917982229233664 |
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| author | Agaev, S. S. Azizi, K. Sundu, H. |
| author_facet | Agaev, S. S. Azizi, K. Sundu, H. |
| contents | Spectroscopic parameters and decays of the exotic tensor meson $T$ with content $bc \overline{b}\overline{c}$ are explored in the context of the diquark-antidiquark model. We treat it as a state built of axial-vector diquark $b^{T}Cγ_{μ}c$ and antidiquark $\overline{b}γ_{ν}C \overline{c}^{T}$, where $C$ is the charge conjugation matrix. The mass $m$ and current coupling $Λ$ of this tetraquark are extracted from two-point sum rules. Our result for $m=(12.70 \pm 0.09)~\mathrm{GeV}$ proves that $T$ is unstable against strong dissociations to two-meson final states. Its dominant decay channels are processes $T \to J/ψΥ$, $ η_{b}η_{c}$, and $B_{c}^{(\ast) +}B_{c}^{(\ast) -}$. Kinematically allowed transformations of $T$ include also decays $T\rightarrow D^{(\ast )+}D^{(\ast )-}$ and $D^{(\ast )0}\overline{D}^{(\ast )0}$, which are generated by $b\overline{b}$ annihilation inside of $T$. The full width of $ T $ is estimated by considering all of these channels. Their partial widths are calculated by invoking methods of three-point sum rule approach which are required to evaluate strong couplings at corresponding tetraquark-meson-meson vertices. Our predictions for the mass and width $ Γ_{T}=(117.4 \pm 15.9)~ \mathrm{MeV} $ of the tensor state $T$ provide useful information for experimental studies of fully heavy four-quark exotic structures. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_22439 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Properties of the tensor state $bc\overline{b}\overline{c}$ Agaev, S. S. Azizi, K. Sundu, H. High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Spectroscopic parameters and decays of the exotic tensor meson $T$ with content $bc \overline{b}\overline{c}$ are explored in the context of the diquark-antidiquark model. We treat it as a state built of axial-vector diquark $b^{T}Cγ_{μ}c$ and antidiquark $\overline{b}γ_{ν}C \overline{c}^{T}$, where $C$ is the charge conjugation matrix. The mass $m$ and current coupling $Λ$ of this tetraquark are extracted from two-point sum rules. Our result for $m=(12.70 \pm 0.09)~\mathrm{GeV}$ proves that $T$ is unstable against strong dissociations to two-meson final states. Its dominant decay channels are processes $T \to J/ψΥ$, $ η_{b}η_{c}$, and $B_{c}^{(\ast) +}B_{c}^{(\ast) -}$. Kinematically allowed transformations of $T$ include also decays $T\rightarrow D^{(\ast )+}D^{(\ast )-}$ and $D^{(\ast )0}\overline{D}^{(\ast )0}$, which are generated by $b\overline{b}$ annihilation inside of $T$. The full width of $ T $ is estimated by considering all of these channels. Their partial widths are calculated by invoking methods of three-point sum rule approach which are required to evaluate strong couplings at corresponding tetraquark-meson-meson vertices. Our predictions for the mass and width $ Γ_{T}=(117.4 \pm 15.9)~ \mathrm{MeV} $ of the tensor state $T$ provide useful information for experimental studies of fully heavy four-quark exotic structures. |
| title | Properties of the tensor state $bc\overline{b}\overline{c}$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2410.22439 |