Based on (10087 ± 44) × 106J/ψ events recorded with the BESIII detector, we search for the rare charmonium weak decays J/ψ→Ds−ρ++c.c. and J/ψ→Ds−π++c.c. No signal is observed, and upper limits on the branching fractions at the 90% confidence level are set as BJ/ψ→Ds−ρ++c.c.<8.0×10−7 and BJ/ψ→Ds−π++c.c.<4.1×10−7. Our results provide the most stringent experimental constraints on these decays.
Search for the charmonium weak decays J/ψ→Ds−ρ++c.c. and J/ψ→Ds−π++c.c.
Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2025-01-01
Abstract
Based on (10087 ± 44) × 106J/ψ events recorded with the BESIII detector, we search for the rare charmonium weak decays J/ψ→Ds−ρ++c.c. and J/ψ→Ds−π++c.c. No signal is observed, and upper limits on the branching fractions at the 90% confidence level are set as BJ/ψ→Ds−ρ++c.c.<8.0×10−7 and BJ/ψ→Ds−π++c.c.<4.1×10−7. Our results provide the most stringent experimental constraints on these decays.
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