arXiv Open Access 2024

Decays $τ\to f_0(π,K) ν_τ$ and $τ\to 3 πν_τ$ accounting for the contribution of $f_0(500)$

M. K. Volkov A. A. Pivovarov K. Nurlan

Lihat Sumber

Abstrak

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.

Topik & Kata Kunci

hep-ph

Penulis (3)

M. K. Volkov

A. A. Pivovarov

K. Nurlan

Format Sitasi

APA MLA BibTeX

Volkov, M.K., Pivovarov, A.A., Nurlan, K. (2024). Decays $τ\to f_0(π,K) ν_τ$ and $τ\to 3 πν_τ$ accounting for the contribution of $f_0(500)$. https://arxiv.org/abs/2412.11093

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2024
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓