Search for an axion-like particle in radiative J/ψ decays
М. Н. Ачасов, P. Adlarson, R. Aliberti, A. Amoroso et autres
We search for an axion-like particle (ALP) a through the process ψ(3686)→π+π−J/ψ, J/ψ→γa, a→γγ in a data sample of (2.71±0.01)×109 ψ(3686) events collected by the BESIII detector. No significant ALP signal is observed over the expected background, and the upper limits on …
cn, ru, se, de, it, pl, mn (code pays fourni par la source)