Speaker
Eulogio Oset
(University of Valencia)
Description
We study the J/ψ → ϕπ+a0(980),(a0 → π−η) decay, evaluating the double mass distribution in terms of the π−η and π+a0 invariant masses. We show that the π−η mass distribution exhibitsthe typical cusp structure of the a0(980) seen in recent high statistics experiments, and the π+a0
spectrum shows clearly a peak around Minv(π+a0) = 1420 MeV, corresponding to a triangle singularity. When integrating over the two invariant masses we find a branching ratio for this decay ofthe order of 10−5, which is easily accessible in present laboratories.
| session | D. Hadron Decays |
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Primary author
Eulogio Oset
(University of Valencia)
Co-authors
Prof.
Chu Wen Xiao
(Guangxi Normal Univ)
Dr
Jorgivan Dias
(Ins, Theor Phys Beijing)
Prof.
Lian Rong Dai
(Huzhou Normal University)
Prof.
Wei Hong Liang
(Guangxi Normal Univ)
