Accès ouvert
2024
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
Based on a data sample of 10 billion $J/ψ$ events collected with the BESIII detector, improved measurements of the Dalitz decays $η/η'\rightarrowγe^+e^-$ are performed, where the $η$ and $η'$ are produced through the radiative decays $J/ψ\rightarrowγη/η'$. The branching fractions of $η\rightarrowγe^+e^-$ and …
Accès ouvert
2024
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
The absolute branching fraction of the decay $Λ_{c}(2625)^{+}\to Λ^{+}_{c}π^+π^-$ is measured for the first time to be $(50.7 \pm 5.0_{\rm{stat.}} \pm 4.9_{\rm{syst.}} )\%$ with 368.48 pb$^{-1}$ of $e^+e^-$ collision data collected by the BESIII detector at the center-of-mass energies of $\sqrt{s} = …
Accès ouvert
2024
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
Based on 4.5 fb$^{-1}$ of $e^{+}e^{-}$ collision data accumulated at center-of-mass energies between $4599.53$ MeV and $4698.82$ MeV with the BESIII detector, the decay $Λ_{c}^{+}\to nK_{S}^{0}π^+π^0$ is observed for the first time with a significance of $9.2σ$. The branching fraction is measured …
Accès ouvert
2024
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
Using a sample of $(10087\pm44)\times10^{6}$ $J/ψ$ events collected by the BESIII detector at the BEPCII collider, a partial-wave analysis of the decay $γγϕ$ is performed to investigate the intermediate resonances in $J/ψ\rightarrowγR, R\arγϕ$. Resonances including $f_{1}(1285)$, $η(1405)$, $f_{1}(1420)$, $f_{1}(1510)$, $f_{2}(1525)$, $X(1835)$, $f_{2}(1950)$, …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
By analyzing $(27.12\pm0.14)\times10^8$ $ψ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decay processes $χ_{cJ} \to 3(K^+K^-)$ ($J=0,1,2$) are observed for the first time with statistical significances of 8.2$σ$, 8.1$σ$, and 12.4$σ$, respectively. The product branching fractions of …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, X. Ai et autres
We present cross sections for the reaction $e^+e^-\to K_S^0K_L^0$ at center-of-mass energies ranging from 3.51 GeV to 4.95 GeV using data samples collected in the BESIII experiment, corresponding to a total integrated luminosity of 26.5 fb$^{-1}$. The ratio of neutral-to-charged kaon form …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
Using $e^+e^-$ annihilation data corresponding to an integrated luminosity of 2.93 $\rm fb^{-1}$ taken at the center-of-mass energy $\sqrt{s}=3.773$~GeV with the BESIII detector, a joint amplitude analysis is performed on the decays $D^0\toπ^+π^-π^+π^-$ and $D^0\toπ^+π^-π^0π^0$(non-$η$). The fit fractions of individual components are …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, X. Ai et autres
We present the first observation of the singly Cabibbo-suppressed decay $Λ_c^+ \rightarrow ΛK^+π^0$ with a significance of $5.7σ$ and the first evidence of $Λ_c^+ \rightarrow ΛK^+π^+π^-$ decay with a significance of $3.1σ$, based on $e^+e^-$ annihilation data recorded by the BESIII detector …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, X. Ai et autres
Evidence for the singly Cabibbo suppressed decay $Λ_c^+\to pπ^0$ is reported for the first time with a statistical significance of $3.7σ$ based on 6.0 $\mathrm{fb}^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies between 4.600 and 4.843 GeV with the BESIII detector …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
The Cabbibo-favored decay $Λ_{c}^+ \to Ξ^{0}K^{+}π^{0}$ is studied for the first time using 6.1 fb$^{-1}$ of $e^+e^-$ collision data at center-of-mass energies between 4.600 and 4.840 GeV, collected with the BESIII detector at the BEPCII collider. With a double-tag method, the branching …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
Based on 7.33 fb$^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, the experimental studies of the doubly Cabibbo-suppressed decays $D^+_s\to K^+K^+π^-$ and $D^+_s\to K^+K^+π^-π^0$ are reported. We determine the absolute branching fraction …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, Mikhail N. Achasov, P. Adlarson, O. Afedulidis et autres
The singly Cabibbo-suppressed decay $Λ_{c}^{+}\to Σ^{-}K^{+}π^{+}$ is observed for the first time with a statistical significance of $6.4σ$ by using 4.5 fb$^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. The …