https://doi.org/10.1140/epjc/s10052-017-5020-5
Regular Article - Theoretical Physics
Possible signatures for tetraquarks from the decays of 
, 
1
School of Liberal Arts and Science, Korea Aerospace University, Goyang, 412-791, Korea
2
Research Institute of Basic Science, Korea Aerospace University, Goyang, 412-791, Korea
* e-mail: hungchong@kau.ac.kr
Received:
26
March
2017
Accepted:
23
June
2017
Published online:
30
June
2017
Based on the recent proposal for the tetraquarks with the mixing scheme, we investigate fall-apart decays of 
into two lowest-lying mesons. This mixing scheme suggests that and are the tetraquarks with the mixtures of two spin configurations of diquark and antidiquark. Due to the relative sign differences in the mixtures, the couplings of fall-apart decays into two mesons are strongly enhanced for but suppressed for . We report that this expectation is supported by their experimental decays. In particular, the ratios of the associated partial decay widths, which depend on some kinematical factors and the couplings, are found to be around 
, 
, which seems to agree with the experimental ratios reasonably well. This agreement can be interpreted as the tetraquark signatures for .
© The Author(s), 2017
