Xu Yan

activity

20202025

C P

symmetry in the entangled

Ξ^{0} - Ξ ˉ^{0}

Pairs

45 citations · 249 across the 48 of their papers we have counts for

collaborators

Showing 2021Show all

4 papers · 1 filter

hep-ex2021★ 3 cited

Observation of $J / ψ$ decays to $e^{+} e^{-} e^{+} e^{-}$ and $e^{+} e^{-} μ^{+} μ^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +543

Using a data sample of $4.481 \times 1 0^{8} ψ^{'}$ events collected with the BESIII detector, we report the first observation of the four-lepton-decays $J / ψ \to e^{+} e^{-} e^{+} e^{-}$ and $J…

hep-ex2021★ 1 cited

Measurement of the $e^{+} e^{-} \to Σ^{0} Σ ˉ^{0}$ cross sections at center-of-mass energies from $2.3864$ to $3.0200$ GeV

M. Ablikim, M. N. Achasov, P. Adlarson +484

The Born cross sections of $e^{+} e^{-} \to Σ^{0} Σ ˉ^{0}$ are measured at center-of-mass energies from $2.3864$ to $3.0200$ GeV using data samples with an integrated luminosity of…

hep-ex2021★ 5 cited

Measurement of the absolute branching fractions of Jpsi to gamma eta and eta decay modes

BESIII Collaboration

Based on a data sample of (1.0087+-0.0044)x10^10 Jpsi events collected by the BESIII detector at the BEPCII accelerator, the absolute branching fraction (BF) of the decay Jpsi->gam…

hep-ex2021★ 11 cited

First Measurement of the Absolute Branching Fraction of $Λ \to p μ^{-} ν ˉ_{μ}$

M. Ablikim, M. N. Achasov, P. Adlarson +504

The absolute branching fraction of $Λ \to p μ^{-} ν ˉ_{μ}$ is reported for the first time based on an $e^{+} e^{-}$ annihilation sample of ten billion $J / ψ$ events collected with the BESII…

Observation of J/ψ decays to e+e−e+e− and e+e−μ+μ−

Measurement of the e+e−→Σ0Σˉ0 cross sections at center-of-mass energies from 2.3864 to 3.0200 GeV

Measurement of the absolute branching fractions of Jpsi to gamma eta and eta decay modes

First Measurement of the Absolute Branching Fraction of Λ→pμ−νˉμ​

Observation of $J / ψ$ decays to $e^{+} e^{-} e^{+} e^{-}$ and $e^{+} e^{-} μ^{+} μ^{-}$

Measurement of the $e^{+} e^{-} \to Σ^{0} Σ ˉ^{0}$ cross sections at center-of-mass energies from $2.3864$ to $3.0200$ GeV

First Measurement of the Absolute Branching Fraction of $Λ \to p μ^{-} ν ˉ_{μ}$