Decays of the light hybrid meson $1^{\mathrm{-+}}$
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866929725657579520 |
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| author | Esmer, G. Daylan Azizi, K. Sundu, H. Türkmen, S. |
| author_facet | Esmer, G. Daylan Azizi, K. Sundu, H. Türkmen, S. |
| contents | The full width of the light isovector hybrid meson $H_{\mathrm{V}}$ with spin-parities $1^{\mathrm{-+}}$ and content $(\overline{u}gu-\overline{d}gd)/ \sqrt{2}$ is evaluated by considering the decays $H_{\mathrm{V}} \to ρ^{\pm}π^{\mp}$, $b_1^{\pm}π^{\mp}$, $f_1(1285)π$, $f_1(1420)π$, $ ηπ$, and $η^{\prime} π$. To calculate the partial widths of these channels, we use QCD three-point sum rule method which is necessary to determine strong couplings at the corresponding hybrid-meson-meson vertices. It turns out that the main contribution to the full width $Γ[H_{\mathrm{ V}}]=(109.7 \pm 16.0)~\mathrm{MeV}$ of the hybrid meson comes from the processes $H_{\mathrm{V}} \to ρ^{\pm}π^{\mp}$ partial width of which amounts to $\approx 67~\mathrm{MeV}$. The effects of the decays $H_{\mathrm{V }} \to b_1π$ and $H_{\mathrm{V}} \to f_1π, f_1^{\prime} π$ are also sizeable: Their partial widths are equal to $13~\mathrm{MeV}$ and $20~ \mathrm{MeV}$, respectively. The decays to $ηπ$ and $η^{\prime} π$ mesons are subdominant reactions, nevertheless they form $\approx 9\%$ of the full width $Γ[H_{\mathrm{V}}]$. Results obtained in this work may be interesting to unravel the tangle of predictions about $H_{\mathrm{V}}$ existing in the literature, as well as useful in analyses of different resonances. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_11331 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Decays of the light hybrid meson $1^{\mathrm{-+}}$ Esmer, G. Daylan Azizi, K. Sundu, H. Türkmen, S. High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice The full width of the light isovector hybrid meson $H_{\mathrm{V}}$ with spin-parities $1^{\mathrm{-+}}$ and content $(\overline{u}gu-\overline{d}gd)/ \sqrt{2}$ is evaluated by considering the decays $H_{\mathrm{V}} \to ρ^{\pm}π^{\mp}$, $b_1^{\pm}π^{\mp}$, $f_1(1285)π$, $f_1(1420)π$, $ ηπ$, and $η^{\prime} π$. To calculate the partial widths of these channels, we use QCD three-point sum rule method which is necessary to determine strong couplings at the corresponding hybrid-meson-meson vertices. It turns out that the main contribution to the full width $Γ[H_{\mathrm{ V}}]=(109.7 \pm 16.0)~\mathrm{MeV}$ of the hybrid meson comes from the processes $H_{\mathrm{V}} \to ρ^{\pm}π^{\mp}$ partial width of which amounts to $\approx 67~\mathrm{MeV}$. The effects of the decays $H_{\mathrm{V }} \to b_1π$ and $H_{\mathrm{V}} \to f_1π, f_1^{\prime} π$ are also sizeable: Their partial widths are equal to $13~\mathrm{MeV}$ and $20~ \mathrm{MeV}$, respectively. The decays to $ηπ$ and $η^{\prime} π$ mesons are subdominant reactions, nevertheless they form $\approx 9\%$ of the full width $Γ[H_{\mathrm{V}}]$. Results obtained in this work may be interesting to unravel the tangle of predictions about $H_{\mathrm{V}}$ existing in the literature, as well as useful in analyses of different resonances. |
| title | Decays of the light hybrid meson $1^{\mathrm{-+}}$ |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2501.11331 |