Study of the Dalitz decay $J/ψ→{e}^{+}{e}^{−}η$

4 years ago

Study of the Dalitz decay $J/ψ→{e}^{+}{e}^{−}η$

$Study of the Dalitz decay $J/ψ→{e}^{+}{e}^{−}η$$

We study the electromagnetic Dalitz decay $J/ψ→{e}^{+}{e}^{−}η$ and search for dielectron decays of a dark gauge boson (${γ}^{′}$) in $J/ψ→{γ}^{′}η$ with the two $η$ decay modes $η→γγ$ and $η→{π}^{+}{π}^{−}{π}^{0}$ using $(1310.6±7.0)×{10}^{6}\text{ }\text{ }J/ψ$ events collected with the BESIII det...

Publisher URL: http://link.aps.org/doi/10.1103/PhysRevD.99.012006

Open URL: https://doi.org/10.1103/physrevd.99.012006

DOI: 10.1103/PhysRevD.99.012006