Search for a light exotic particle in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math>radiative decays

R. Baldini Ferroli, D. Ambrose, F. F. An et al.|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|2012

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