We search for J/ψ radiative decays into a weakly interacting neutral particle, namely an invisible particle, using the J/ψ produced through the process ψ(3686)→π+π-J/ψ in a data sample of (448.1±2.9)×106 ψ(3686) decays collected by the BESIII detector at BEPCII. No significant signal is observed. Using a modified frequentist method, upper limits on the branching fractions are set under different assumptions of invisible particle masses up to 12 GeV/c2. The upper limit corresponding to an invisible particle with zero mass is 7.0×10-7 at the 90% confidence level
We search for invisible decays of the Υ ( 1 S ) meson using a sample of 91.4 × 10 6 Υ ( 3 S ) mesons...
The NA62 experiment at CERN reports searches for K+ → e+N, K+→μ+N and K+→μ+νX decays, where N and X ...
Using a sample of 1.31×109 J/ψ events collected with the BESIII detector, we perform a search for th...
We search for J/ψ radiative decays into a weakly interacting neutral particle, namely an invisible p...
A search for J/ψ radiative decay to weakly interacting neutral final states was performed using the ...
Using a data sample of (1310.6±7.0)×106 J/ψ events collected with the BESIII detector operating at t...
Using a data sample of (1310.6±7.0)×106 J/ψ events collected with the BESIII detector operating at ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4×109 tagged π0 mesons from K+ → ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ ...
Using a data sample of $(1310.6 \pm 7.0)\times 10^6$ $J/\psi$ events collected with the BESIII detec...
Using a data sample containing $1.06×10^8 ψ^′$ events collected with the BESIII detector at the BEPC...
The NA62 experiment at CERN reports searches for K+ → μ+N and K+ → μ+νX decays, where N and X are ma...
The NA62 experiment at CERN reports searches for K + → μ+N and K + → μ+ν X decays, where N and X are...
We search for invisible decays of the Υ ( 1 S ) meson using a sample of 91.4 × 10 6 Υ ( 3 S ) mesons...
The NA62 experiment at CERN reports searches for K+ → e+N, K+→μ+N and K+→μ+νX decays, where N and X ...
Using a sample of 1.31×109 J/ψ events collected with the BESIII detector, we perform a search for th...
We search for J/ψ radiative decays into a weakly interacting neutral particle, namely an invisible p...
A search for J/ψ radiative decay to weakly interacting neutral final states was performed using the ...
Using a data sample of (1310.6±7.0)×106 J/ψ events collected with the BESIII detector operating at t...
Using a data sample of (1310.6±7.0)×106 J/ψ events collected with the BESIII detector operating at ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4×109 tagged π0 mesons from K+ → ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ ...
The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ ...
Using a data sample of $(1310.6 \pm 7.0)\times 10^6$ $J/\psi$ events collected with the BESIII detec...
Using a data sample containing $1.06×10^8 ψ^′$ events collected with the BESIII detector at the BEPC...
The NA62 experiment at CERN reports searches for K+ → μ+N and K+ → μ+νX decays, where N and X are ma...
The NA62 experiment at CERN reports searches for K + → μ+N and K + → μ+ν X decays, where N and X are...
We search for invisible decays of the Υ ( 1 S ) meson using a sample of 91.4 × 10 6 Υ ( 3 S ) mesons...
The NA62 experiment at CERN reports searches for K+ → e+N, K+→μ+N and K+→μ+νX decays, where N and X ...
Using a sample of 1.31×109 J/ψ events collected with the BESIII detector, we perform a search for th...