Accès ouvert
2024
article
OpenAlex
М. Н. Ачасов, P. Adlarson, R. Aliberti, A. Amoroso et autres
Using e^{+}e^{-} collision data corresponding to an integrated luminosity of 7.33 fb^{-1} recorded by the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, we present an analysis of the decay D_{s}^{+}→π^{+}π^{-}e^{+}ν_{e}, where the D_{s}^{+} is produced via the process e^{+}e^{-}→D_{s}^{*±}D_{s}^{∓}. …
cn, ru, se, de, it, pl, mn, us, tr, kr, gb
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Accès ouvert
2024
article
OpenAlex
М. Н. Ачасов, P. Adlarson, X. Ai, R. Aliberti et autres
We present cross sections for the reaction e^{+}e^{-}→K_{S}^{0}K_{L}^{0} at center-of-mass energies ranging from 3.51 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 factors at …
cn, ru, se, de, it, pl, mn, us, tr, kr, gb
(code pays fourni par la source)
Accès ouvert
2024
article
OpenAlex
М. Н. Ачасов, 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
М. Н. Ачасов, 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
М. Н. Ачасов, 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
М. Н. Ачасов, 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
М. Н. Ачасов, 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)
Accès ouvert
2020
article
OpenAlex
М. Н. Ачасов, P. Adlarson, S. Ahmed, M. Albrecht et autres
Using $2.93\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collision data taken at a center-of-mass energy of 3.773 GeV with the BESIII detector, we report the first measurements of the absolute branching fractions of 14 hadronic ${D}^{0(+)}$ decays to exclusive final states with an $\ensuremath{\eta}$, …
cn, ru, se, de, it, in, mn, us, tr, gb
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
М. Н. Ачасов, S. Ahmed, M. Albrecht, A. Amoroso et autres
Using a data sample corresponding to an integrated luminosity of $2.93\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ taken at a center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we perform an analysis of the semileptonic decays ${D}^{0(+)}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}(0)}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}$. The branching fractions …
cn, ru, de, it, us, tr, nl
(code pays fourni par la source)
Accès ouvert
2012
article
OpenAlex
M. N. Achasov, Diego Alberto, D. Ambrose, F. F. An et autres
The mass and width of the lowest-lying $S$-wave spin singlet charmonium state, the ${\ensuremath{\eta}}_{c}$, are measured using a data sample of $1.06\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $\ensuremath{\psi}(3686)$ decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference …
cn
(code pays fourni par la source)