Search for a massless particle beyond the Standard Model in the Ξ0 → Λ + invisible decay
M. Ablikim, M. N. Achasov, P. Adlarson, X. C. Ai et autres
A bstract A search for a massless beyond-standard-model particle is performed in the decay Ξ 0 → Λ + invisible using (1.0087 ± 0.0044) × 10 10 J / ψ events collected with the BESIII detector at the BEPCII collider. No significant …
ru, se, cn, it, de, pl, mn, us, tr, kr, gb (code pays fourni par la source)
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Journal of High Energy Physics