The puzzle of excessive non-DD component of
ve ψ(3770) decay and the long-distant
In our recent work,
we suggested that the obvious discrepancy between theoretical prediction on
decays of ψ(3770) and data is to be alleviated by taking final state interaction (FSI)
into account. By assuming that ψ(3770) overwhelmingly dissociates into DD,
then the final state interaction induces a secondary process,
we calculate the branching ratios of ψ(3770)→ DD→
J/ψη, ρπ, ωη, K*K, KK .
Our results show that the branching ratio of
can reach up to
FSI=(0.4∼1.1)% while typical parameters
I=0.4 GeV-2 and α=0.8∼1.1 are adopted.
This indicates that the FSI is obviously non-negligible.