Speaker
Dr
Alexey Kiselev
(Sobolev Institute for Mathematics)
Description
The decays $D^0\to d\bar u\,e^+\nu\to a^-_0(980)\,
e^+\nu\to\pi^-\eta\, e^+\nu$ and $D^+\to d\bar d\,e^+\nu\to
a^0_0(980)\, e^+\nu\to\pi^0\eta\, e^+\nu$ (and the charge
conjugated ones) are the direct probe of the constituent two-quark
components in the $a^\pm_0(980)$ and $a^0_0(980)$ wave functions.
Recent BESIII experiment is the first step in experimental study
of these decays. We suggest adequate formulas for the data
analysis and present a variant of $\eta\pi$ invariant mass
distribution when $a_0(980)$ has no constituent two-quark
component at all.
Primary author
Dr
Alexey Kiselev
(Sobolev Institute for Mathematics)
Co-author
Prof.
Nikolay Achasov
(Sobolev Institute for Mathematics)
