Accès ouvert
2024
article
OpenAlex
Mikhail N. Achasov, P. Adlarson, X. Ai, R. Aliberti et autres
Based on 4.4 fb^{-1} of e^{+}e^{-} annihilation data collected at the center-of-mass energies between 4.60 and 4.70 GeV with the BESIII detector at the BEPCII collider, the pure W-boson-exchange decay Λ_{c}^{+}→Ξ^{0}K^{+} is studied with a full angular analysis. The corresponding decay asymmetry …
cn, ru, se, de, it, pl, mn, us, tr, kr, gb
(code pays fourni par la source)
Accès ouvert
2023
article
OpenAlex
Mikhail N. Achasov, P. Adlarson, X. Ai, R. Aliberti et autres
We study the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{c}^{+}{\overline{\mathrm{\ensuremath{\Lambda}}}}_{c}^{\ensuremath{-}}$ at twelve center-of-mass energies from 4.6119 to 4.9509 GeV using data samples collected by the BESIII detector at the BEPCII collider. The Born cross sections and effective form factors ($|{G}_{\mathrm{eff}}|$) are determined with unprecedented precision after combining …
cn, ru, se, de, it, pl, mn, us, tr, kr, gb
(code pays fourni par la source)
Accès ouvert
2023
article
OpenAlex
Mikhail N. Achasov, P. Adlarson, R. Aliberti, A. Amoroso et autres
Using $7.33\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collision data taken with the BESIII detector at the BEPCII collider, we report the first experimental study of the purely leptonic decay ${D}_{s}^{*+}\ensuremath{\rightarrow}{e}^{+}{\ensuremath{\nu}}_{e}$. Our data contain a signal of this decay with a statistical significance of …
cn, ru, se, de, it, pl, mn, us, cy, kr, gb
(code pays fourni par la source)
Accès ouvert
2023
article
OpenAlex
M Ablikim, Mikhail N. Achasov, P. Adlarson, X. Ai et autres
Using data samples with an integrated luminosity of 5.85 fb^{-1} collected at center-of-mass energies from 4.61 to 4.95 GeV with the BESIII detector operating at the BEPCII storage ring, we measure the cross section for the process e^{+}e^{-}→K^{+}K^{-}J/ψ. A new resonance with …
cn, ru, se, de, it, pl, mn, us, tr, kr, gb
(code pays fourni par la source)
Accès ouvert
2023
article
OpenAlex
Mikhail N. Achasov, P. Adlarson, M. Albrecht, R. Aliberti et autres
Using a sample of $4.3\ifmmode\times\else\texttimes\fi{}{10}^{5}$ ${\ensuremath{\eta}}^{\ensuremath{'}}\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ events selected from the ten billion $J/\ensuremath{\psi}$ event dataset collected with the BESIII detector, we study the decay ${\ensuremath{\eta}}^{\ensuremath{'}}\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ within the framework of nonrelativistic effective field theory. Evidence for a structure at ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ mass threshold is …
cn, ru, se, de, it, pl, mn, us, tr, gb
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
Mikhail N. Achasov, P. Adlarson, S. Ahmed, M. Albrecht et autres
Based on electron-positron collision data collected with the BESIII detector operating at the Beijing Electron-Positron Collider II storage rings, the value of $R\ensuremath{\equiv}\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\text{hadrons})/\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})$ is measured at 14 center-of-mass energies from 2.2324 to 3.6710 GeV. The resulting uncertainties are less than 3.0% and …
cn, ru, se, de, it, mn, us, tr, gb
(code pays fourni par la source)