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arXiv · 2106.10670

Semileptonic decays $D\to\eta\pi e^+\nu_e$ in the $a_0(980)$ region

N. N. Achasov·A. V. Kiselev·G. N. Shestakov
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Abstract

The mechanism of the four-quark production of the light scalar isovector four-quark state $a_0(980)$ in the $D\to\eta\pi e^+\nu_e$ decays is discussed. It is shown that the characteristic features of the shape of the $\eta\pi$ mass spectra expected in our scheme can serve as the indicator of the production mechanism and internal structure of the $a_0(980)$ resonance.

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N. N. Achasov, A. V. Kiselev, G. N. Shestakov. 2021-06-20. Semileptonic decays $D\to\eta\pi e^+\nu_e$ in the $a_0(980)$ region. https://doi.org/10.1103/physrevd.104.016034

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