W. B. Qian

activity

20222024

collaborators

9 papers

hep-ex2024

Search for $X (1870)$ via the decay $J / ψ \to ω K^{+} K^{-} η$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using a sample of $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected by the BESIII detector at the BEPCII collider, we search for the decay $X (1870) \to K^{+} K^{-} η$ via the $J/ψ\to ωK…

hep-ex2024

Search for the production of deuterons and antideuterons in e^+e^- annihilation at center-of-mass energies between 4.13 and 4.70 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +603

Using a data sample of $e^{+} e^{-}$ collision data corresponding to an integrated luminosity of 19 fb $^{- 1}$ collected with the BESIII detector at the BEPCII collider, we search for th…

hep-ex2024

First measurements of the absolute branching fraction of $Λ_{c} (2625)^{+} \to Λ_{c}^{+} π^{+} π^{-}$ and upper limit on $Λ_{c} (2595)^{+} \to Λ_{c}^{+} π^{+} π^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +613

The absolute branching fraction of the decay $Λ_{c} (2625)^{+} \to Λ_{c}^{+} π^{+} π^{-}$ is measured for the first time to be $(50.7 \pm 5. 0_{stat.} \pm 4. 9_{syst.}) %$ with 36…

hep-ex2024

Observation of structures in the processes $e^{+} e^{-} \to ω χ_{c 1}$ and $ω χ_{c 2}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +619

We present measurements of the Born cross sections for the processes $e^{+} e^{-} \to ω χ_{c 1}$ and $ω χ_{c 2}$ at center-of-mass energies $s$ from 4.308 to 4.951 GeV. The mea…

hep-ex2023

Observation of $χ_{c J} \to 3 (K^{+} K^{-})$

BESIII Collaboration, M. Ablikim, M. N. Achasov +642

By analyzing $(27.12 \pm 0.14) \times 1 0^{8}$ $ψ (3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decay processes $χ_{c J} \to 3 (K^{+} K^{-})$ ( $J = 0, 1, 2$ )…

hep-ex2023

Improved measurement of the branching fractions for $J / ψ \to γ π^{0}$ , $γ η$ and $γ η^{'}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +609

Using a data sample of $(1.0087 \pm 0.0044) \times 1 0^{10}$ $J / ψ$ events collected with the BESIII detector, the decays of $J / ψ \to γ π^{0} (η, η^{'}) \to γ γ γ$ are studied. Newly measu…

Search for X(1870) via the decay J/ψ→ωK+K−η

Search for the production of deuterons and antideuterons in e^+e^- annihilation at center-of-mass energies between 4.13 and 4.70 GeV

First measurements of the absolute branching fraction of Λc​(2625)+→Λc+​π+π− and upper limit on Λc​(2595)+→Λc+​π+π−

Observation of structures in the processes e+e−→ωχc1​ and ωχc2​

Observation of χcJ​→3(K+K−)

Improved measurement of the branching fractions for J/ψ→γπ0, γη and γη′

Search for $X (1870)$ via the decay $J / ψ \to ω K^{+} K^{-} η$

First measurements of the absolute branching fraction of $Λ_{c} (2625)^{+} \to Λ_{c}^{+} π^{+} π^{-}$ and upper limit on $Λ_{c} (2595)^{+} \to Λ_{c}^{+} π^{+} π^{-}$

Observation of structures in the processes $e^{+} e^{-} \to ω χ_{c 1}$ and $ω χ_{c 2}$

Observation of $χ_{c J} \to 3 (K^{+} K^{-})$

Improved measurement of the branching fractions for $J / ψ \to γ π^{0}$ , $γ η$ and $γ η^{'}$