Jun 26 – 29, 2017
Schloss Waldthausen
Europe/Berlin timezone

Theoretical Description of the Invariant Mass Distribution of the decay $Y(4260) \to J/ \psi \; \pi^{+} \pi^{-}$

Jun 27, 2017, 6:30 PM
1h 30m
Helmholtz-Institut Mainz

Helmholtz-Institut Mainz

Staudingerweg 18, 55128 Mainz
Board: 13


Mr Daniel Molnar (JGU Mainz)


In this work, we aim to provide a physical description of the recent BESIII data on the exotic meson decay, $ Y(4260) \to J/ \psi \; \pi^{+} \pi^{-}$. In the $\psi \pi$ invariant mass distribution, one can observe two peaks, which correspond to the exotic meson $Z_c(3900)$ and its kinematic reflection. Its shape can be parameterized as a S-wave Breit-Wigner and a background, which comes from the final state interactions of two pions. The latter we implement using unitarity and analyticity constraints. In result, a simultaneous description of $\psi \pi$ and $\pi \pi$ invariant mass distributions is achieved.

Primary author

Mr Daniel Molnar (JGU Mainz)


Dr Igor Danilkin (Johannes Gutenberg-Universität Mainz) Prof. Marc Vanderhaeghen (Univ. Mainz)

Presentation materials

There are no materials yet.