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Abstract
The disagreement between the standard model prediction and the experimental measurement of muon anomalous magnetic moment can be alleviated by invoking an additional particle which is either a vector boson (X1) or a scalar (X0). This new particle, with the mass mX ≲ 2mμ, can be searched for in the decay J/ψ → μ−μ+X, where X is missing. Our numerical study shows that the search is quite feasible at the BESIII experiment in the parameter space allowed by muon g − 2 measurements.
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Details
1 Universidad Tecnica, Department of Physics, Valpraiso, Chile
2 Dongshin University, Institute of High Energy Physics, Naju, Korea (GRID:grid.412069.8) (ISNI:0000 0004 1770 4266); Yonsei University, Department of Physics and IPAP, Seoul, Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454)
3 Yonsei University, Department of Physics and IPAP, Seoul, Korea (GRID:grid.15444.30) (ISNI:0000 0004 0470 5454)