Decays $τ\to f_0(π,K) ν_τ$ and $τ\to 3 πν_τ$ accounting for the contribution of $f_0(500)$
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| Format: | Preprint |
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2024
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| _version_ | 1866912156793962496 |
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| author | Volkov, M. K. Pivovarov, A. A. Nurlan, K. |
| author_facet | Volkov, M. K. Pivovarov, A. A. Nurlan, K. |
| contents | In the $U(3) \times U(3)$ quark NJL model, $τ$ lepton decays with the production of scalar mesons $f_0(π,K])$ and neutrinos are studied, where $f_0=f_0(500), f_0(980)$. It is shown that these decays mainly occur via contact channels and channels with axial-vector mesons $a_1$, $K_1(1270)$ and $K_1(1400)$. All mesons are considered as quark-antiquark states in this case. The obtained results can be considered as predictions for future experiments. The obtained estimates for the branching fractions of the $τ\to π^-2π^0 ν_τ$ decay taking into account the contributions of the $ρπ$ and $f_0(500)π$ states are in satisfactory agreement with experimental data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_11093 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Decays $τ\to f_0(π,K) ν_τ$ and $τ\to 3 πν_τ$ accounting for the contribution of $f_0(500)$ Volkov, M. K. Pivovarov, A. A. Nurlan, K. High Energy Physics - Phenomenology In the $U(3) \times U(3)$ quark NJL model, $τ$ lepton decays with the production of scalar mesons $f_0(π,K])$ and neutrinos are studied, where $f_0=f_0(500), f_0(980)$. It is shown that these decays mainly occur via contact channels and channels with axial-vector mesons $a_1$, $K_1(1270)$ and $K_1(1400)$. All mesons are considered as quark-antiquark states in this case. The obtained results can be considered as predictions for future experiments. The obtained estimates for the branching fractions of the $τ\to π^-2π^0 ν_τ$ decay taking into account the contributions of the $ρπ$ and $f_0(500)π$ states are in satisfactory agreement with experimental data. |
| title | Decays $τ\to f_0(π,K) ν_τ$ and $τ\to 3 πν_τ$ accounting for the contribution of $f_0(500)$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.11093 |