Accès ouvert
2025
preprint
OpenAlex
BESIII Collaboration, М. Н. Ачасов, P. Adlarson, X. Ai et autres
Using $(2712.4\pm14.3)\times10^6$ $ψ(3686)$ events collected by the BESIII detector operating at the BEPCII storage ring, the decays $χ_{cJ}(J=0,1,2)\rightarrow p\bar{p}ηη$ are observed for the first time through the radiative transition $ψ(3686)\toγχ_{cJ}$. The statistical significances for $χ_{cJ}$ signals are all larger than 5$σ$. The …
Accès ouvert
2025
preprint
OpenAlex
BESIII Collaboration, М. Н. Ачасов, P. Adlarson, X. C. Ai et autres
Based on a sample of $2.7\times10^{9}$ $ψ(3686)$ events collected by the BESIII detector operating at the BEPCII collider, an analysis of the decay $ψ(3686)\toγχ_{cJ}, χ_{cJ}\toηηη^{\prime}$ is performed. The decay modes $χ_{c1}$ and $χ_{c2}\toηηη^{\prime}$ are observed for the first time, and their corresponding …
Accès ouvert
2022
preprint
OpenAlex
BESIII Collaboration, М. Н. Ачасов, P. Adlarson, M. Albrecht et autres
Based on a sample of $448.1\times10^6\ ψ(3686)$ events collected with the BESIII detector, a study of $ψ(3686)\toΛ\barΛπ^0$ and $ψ(3686)\toΛ\barΛη$ is performed. Evidence of the isospin-violating decay $ψ(3686)\toΛ\barΛπ^0$ is found for the first time with a statistical significance of $3.7σ$, the branching fraction …
Accès ouvert
2019
preprint
OpenAlex
М. Н. Ачасов, P. Adlarson, S. Ahmed, M. Albrecht et autres
Using a $3.19~\mathrm{fb}^{-1}$ data sample collected at the $\sqrt{s}~=~4.178$ GeV with the BESIII detector, we search for the rare decay $D_{s}^{+} \rightarrow p \bar{p} e^{+} ν_{e} $. No significant signal is observed, and an upper limit of $\mathcal{B}(D_{s}^{+} \rightarrow p \bar{p} e^{+} …
Accès ouvert
2019
preprint
OpenAlex
М. Н. Ачасов, P. Adlarson, S. Ahmed, M. Albrecht et autres
Based on the data sample of $448.1\times10^{6}$ $ψ(3686)$ events collected with the BESIII detector at BEPCII, we present a study of the decays $ψ(3686)\rightarrowγχ_{cJ}\rightarrowγ\bar{p}K^{*+}Λ+c.c.$ and $ψ(3686)\rightarrow\bar{p}K^{*+}Λ+c.c.$. The branching fractions of $χ_{cJ}\rightarrow\bar{p}K^{*+}Λ+c.c.$ ($J$=0, 1, 2) are measured to be $(4.8\pm0.7\pm0.5)\times10^{-4}$, $(5.0\pm0.5\pm0.4)\times10^{-4}$, and $(8.2\pm0.9\pm0.7)\times10^{-4}$, …
Accès ouvert
2017
preprint
OpenAlex
BESIII Collaboration, М. Н. Ачасов, S. Ahmed, X. Ai et autres
We search for the rare decay $D^+\to D^0 e^+ν_{e}$, using a data set with an integrated luminosity of 2.93 $\rm fb^{-1}$ collected at $\sqrt{s}=3.773$ GeV with the BESIII detector operating at the BEPCII storage rings. No signals are observed. We set the …
Accès ouvert
2015
preprint
OpenAlex
BESIII Collaboration, М. Н. Ачасов, X. Ai, O. Albayrak et autres
In an analysis of a 2.92~fb$^{-1}$ data sample taken at 3.773~GeV with the BESIII detector operated at the BEPCII collider, we measure the absolute decay branching fractions to be $\mathcal B(D^0 \to K^-e^+ν_e)=(3.505\pm 0.014 \pm 0.033)\%$ and $\mathcal B(D^0 \to π^-e^+ν_e)=(0.295\pm 0.004\pm …
Accès ouvert
2015
preprint
OpenAlex
М. Н. Ачасов, X. Ai, O. Albayrak, M. Albrecht et autres
Based on a sample of \etapr mesons produced in the radiative decay $J/ψ\toγη^{\prime}$ in $1.31\times 10^9$ $J/ψ$ events collected with the BESIII detector, the decay $η^{\prime}\toωe^{+} e^{-}$ is observed for the first time, with a statistical significance of $8σ$. The branching fraction …
Accès ouvert
2015
preprint
OpenAlex
М. Н. Ачасов, X. Ai, O. Albayrak, M. Albrecht et autres
Using a data sample of 106 million $ψ(3686)$ events collected with the BESIII detector operated at the BEPCII storage ring, we study for the first time the decay $χ_{cJ}\toϕK^{0}_S K^{\pm}π^{\mp}$ and $χ_{cJ}\toϕK^{+} K^{-}π^{0}$ in the E1 radiative transition $ψ(3686)\toγχ_{cJ}$. The decays are …