The absolute branching fractions B(Xi(1530)^- to Xi^0 pi^-) = 61.4% and B(Xi(1530)^- to Xi^- pi^0) = 29.7% are measured for the first time, with their sum 91.1%, and B(psi(3686) to anti-Xi+ Xi(1530)^- + c.c.) is updated to 8.67 x 10^{-6}.
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BESIII presents experimental searches for sub-GeV dark matter via invisible decays, dark baryons, light vector bosons, and baryon/lepton-number-violating processes in charmonium and hyperon decays.
Measures Br(D_s^+ → μ^+ ν_μ) = (0.5294 ± 0.0108_stat ± 0.0085_syst)% and extracts f_{D_s^+} |V_cs| = 241.8 ± 4.7 MeV.
BESIII sets the most stringent upper limits to date on semileptonic, nonleptonic, and FCNC charmonium weak decays using over 10^10 J/ψ and 2.7×10^9 ψ(2S) events.
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Measurement of the Absolute Branching Fraction of Xi(1530)^{-} to (Xi pi)^{-} and Updated Measurement of the Branching Fraction of psi(3686) to anti-Xi^{+} Xi(1530)^{-} + c.c
The absolute branching fractions B(Xi(1530)^- to Xi^0 pi^-) = 61.4% and B(Xi(1530)^- to Xi^- pi^0) = 29.7% are measured for the first time, with their sum 91.1%, and B(psi(3686) to anti-Xi+ Xi(1530)^- + c.c.) is updated to 8.67 x 10^{-6}.
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Search for dark sector and rare decays at BESIII
BESIII presents experimental searches for sub-GeV dark matter via invisible decays, dark baryons, light vector bosons, and baryon/lepton-number-violating processes in charmonium and hyperon decays.
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Improved measurement of the branching fraction of $D_s^+\to\mu^+\nu_\mu$
Measures Br(D_s^+ → μ^+ ν_μ) = (0.5294 ± 0.0108_stat ± 0.0085_syst)% and extracts f_{D_s^+} |V_cs| = 241.8 ± 4.7 MeV.
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Mini-review of charmonium weak decays at BESIII
BESIII sets the most stringent upper limits to date on semileptonic, nonleptonic, and FCNC charmonium weak decays using over 10^10 J/ψ and 2.7×10^9 ψ(2S) events.