H. P. Cheng

Error Statistics Using the Akaike and Bayesian Information Criteria

H. P. Cheng, Beckett Sterner

us (code pays fourni par la source)

Study of decay dynamics and CP asymmetry in D+→KL0e+νe decay

M. Ablikim, М. Н. Ачасов, X. C. Ai, O. Albayrak et autres

Using $2.92\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of electron-positron annihilation data collected at $\sqrt{s}=3.773\text{ }\text{ }\mathrm{GeV}$ with the BESIII detector, we obtain the first measurements of the absolute branching fraction $\mathcal{B}({D}^{+}\ensuremath{\rightarrow}{K}_{L}^{0}{e}^{+}{\ensuremath{\nu}}_{e})=(4.481\ifmmode\pm\else\textpm\fi{}0.027(\text{stat})\ifmmode\pm\else\textpm\fi{}0.103(\text{sys}))%$ and the $CP$ asymmetry ${A}_{CP}^{{D}^{+}\ensuremath{\rightarrow}{K}_{L}^{0}{e}^{+}{\ensuremath{\nu}}_{e}}=(\ensuremath{-}0.59\ifmmode\pm\else\textpm\fi{}0.60(\text{stat})\ifmmode\pm\else\textpm\fi{}1.48(\text{sys}))%$. From the ${D}^{+}\ensuremath{\rightarrow}{K}_{L}^{0}{e}^{+}{\ensuremath{\nu}}_{e}$ differential decay rate distribution, the product …

cn, ru, us, de, it, tr, nl (code pays fourni par la source)

Search for Zc(3900)±→ωπ±

M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak et autres

The decay ${Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ is searched for using data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies $\sqrt{s}=4.23$ and 4.26 GeV. No significant signal for the ${Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}$ is found, and upper limits at the 90% confidence …

cn, ru, us, de, pk (code pays fourni par la source)

Observation of the ψ(1 D23) State in e+e−→π+π−γχc1 at BESIII

M. N. Achasov, X. Ai, O. Albayrak, M. Albrecht et autres

We report the observation of the $X(3823)$ state in the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}X(3823)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1}$ with a statistical significance of $6.2\ensuremath{\sigma}$, in data samples at center-of-mass energies $\sqrt{s}=4.230$, 4.260, 4.360, 4.420, and 4.600 GeV collected with the BESIII detector at the BEPCII electron positron collider. …

cn, ru, us, de, it, nl, tr (code pays fourni par la source)

Study of the near-threshold ω ϕ mass enhancement in doubly OZI-suppressed J / ψ → γ ω ϕ decays

M. N. Achasov, O. Albayrak, D. J. Ambrose, F. F. An et autres

A $2.25\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $J/\ensuremath{\psi}$ event sample accumulated with the BESIII detector is used to study the doubly Okubo-Zweig-Iizuka-suppressed decay modes $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\omega}\ensuremath{\phi}$, $\ensuremath{\omega}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, $\ensuremath{\phi}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}$. A strong deviation ($>30\ensuremath{\sigma}$) from three-body $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\omega}\ensuremath{\phi}$ phase space is observed near the $\ensuremath{\omega}\ensuremath{\phi}$ mass threshold that is consistent with …

cn, ru, us, de, it, nl, tr, pk (code pays fourni par la source)

Observation of ηc decay into Σ+Σ¯− and Ξ−Ξ¯+ final states

M. Ablikim, M. N. Achasov, O. Albayrak, D. J. Ambrose et autres

Using a data sample of $2.25\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $J/\ensuremath{\psi}$ events collected with the BESIII detector, we present the first observation of the decays of ${\ensuremath{\eta}}_{c}$ mesons to ${\ensuremath{\Sigma}}^{+}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ and ${\ensuremath{\Xi}}^{\ensuremath{-}}{\overline{\ensuremath{\Xi}}}^{+}$. The branching fractions are measured to be $(2.11\ifmmode\pm\else\textpm\fi{}{0.28}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}{0.18}_{\mathrm{syst}}\ifmmode\pm\else\textpm\fi{}{0.50}_{\mathrm{PDG}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ and $(0.89\ifmmode\pm\else\textpm\fi{}{0.16}_{\mathrm{stat}}\ifmmode\pm\else\textpm\fi{}{0.08}_{\mathrm{syst}}\ifmmode\pm\else\textpm\fi{}{0.21}_{\mathrm{PDG}})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ for ${\ensuremath{\eta}}_{c}\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ and ${\ensuremath{\Xi}}^{\ensuremath{-}}{\overline{\ensuremath{\Xi}}}^{+}$, …

cn, ru, jp, ua (code pays fourni par la source)