Speakers
Dr
Georgii Shestakov
(Sobolev Institute for Mathematics, Novosibirsk)
Prof.
Nikolai Achasov
(Sobolev Institute for Mathematics, Novosibirsk)
Description
The isospin-breaking decay $X(3872)\to(D^*\bar D+ \bar D^*D)
\to\pi^0D\bar D\to\pi^0\pi^+\pi^-$ is discussed. In its amplitude
there is a triangle logarithmic singularity, due to which the
dominant contribution to $BR(X(3872)\to\pi^0\pi^+\pi^-)$ comes from
the production of the $\pi^+\pi^-$ system in a narrow interval of
the invariant mass $m_{\pi^+\pi^-}$ near the value of $2m_{D^0}
\approx 3.73$ GeV. The analysis shows that $BR(X(3872)\to\pi^0
\pi^+\pi^-)$ can be expected at the level of $10^{-3}$--$10^{-4}$.
Primary authors
Dr
Georgii Shestakov
(Sobolev Institute for Mathematics, Novosibirsk)
Prof.
Nikolai Achasov
(Sobolev Institute for Mathematics, Novosibirsk)
