Speaker
Yu Meng
Description
Searching for the dark matter is one of the major goals of contemporary astronomy and particle physics. Many experiments have performed the searches for the J/ψ radiative decays into invisible particles, and no signal was observed. In the future, several experiments have the great potential to significantly improve the upper limit on the branching fraction of J/ψ + invisible. In this talk, we present the first lattice QCD study on J/ψ→γνν, which serving as a standard model background for this invisible decay. After a continuous extrapolation for three different lattice spacings, an exact value of the branching fraction is obtained.
| Topical area | Hadronic and Nuclear Spectrum and Interactions |
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