Abstract.
The width of the decay \(\tau\rightarrow f_{1} \pi\nu_{\tau}\) has recently been measured by the BaBar experiment. The estimation of this width is given in the framework of the NJL model with the axial-vector mesons. Prediction is in agreement with experimental data. It is shown that the \( \pi - a_{1}\) transition contribution plays an important role and allows us to bring the NJL prediction to the data.
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Kostunin, D.G., Vishneva, A.V. & Volkov, M.K. The decay \(\tau \rightarrow f_{1} \pi \nu_{\tau}\) in the Nambu-Jona-Lasinio model. Eur. Phys. J. A 50, 137 (2014). https://doi.org/10.1140/epja/i2014-14137-3
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DOI: https://doi.org/10.1140/epja/i2014-14137-3