https://doi.org/10.1140/epjc/s10052-016-4342-z
Regular Article - Theoretical Physics
The
and
in the
decay
1
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
2
School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos, Beihang University, Beijing, 100191, China
3
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China
* e-mail: lisheng.geng@buaa.edu.cn
Received:
14
April
2016
Accepted:
29
August
2016
Published online:
10
September
2016
We propose to study the and the
resonances in the
decay via the final-state interactions of the
and
pairs. The weak interaction part proceeds through the c quark decay process:
, while the hadronization part takes place in two mechanisms, differing in how the quarks from the weak decay combines into
with a
with the quantum numbers of the vacuum. Because the final
and
states are in pure isospin
and
combinations, the
decay can be an ideal process to study the
and
resonances. Describing the final-state interaction in the chiral unitary approach, we find that the
and
invariant mass distributions, up to an arbitrary normalization, show clear cusp and peak structures, which can be associated with the
and
resonances, respectively. The proposed mechanism can provide valuable information on the nature of these resonances and can in principle be tested by facilities such as BEPCII.
© The Author(s), 2016