Cheng Li

Balancing Threshold Voltage and On-Resistance of p-GaN Gate HEMTs via Mg Doping Engineering

Zhanfei Han, Xiangdong Li, Jian Ji, Tao Zhang et autres

Mg out-diffusion during epitaxial growth in MOCVD chambers poses significant challenges in simultaneously achieving a decent threshold voltage${V}_{\text {TH}}$andon-resistance${R}_{\text {ON}}$. In this work, by inserting a GaN layer with thickness${t}_{\text {GaN}}$of 0/5/10 nm between the p-GaN cap and the AlGaN barrier to …

cn (code pays fourni par la source)

Search for e+e− → $$ {K}_S^0{K}_S^0{h}_c $$

M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

A bstract Using e + e − collision data at 13 center-of-mass energies ranging from 4.600 to 4.951 GeV collected with the BESIII detector, we conduct the first search for the e + e − → $$ {K}_S^0{K}_S^0{h}_c $$ K S 0 …

ru, se, de, cn, it, pl, us, tr, kr (code pays fourni par la source)

Observation of $η_{c}(2S) \to K^{+}K^{-}η$

BESIII Collaboration, М. Н. Ачасов, P. Adlarson, O. Afedulidis et autres

By analyzing $(27.12 \pm 0.14)\times10^{8}$ $ψ(3686)$ events accumulated with the BESIII detector, the decay $η_{c}(2S) \to K^{+} K^{-} η$ is observed for the first time with a significance of $6.2σ$ after considering systematic uncertainties. The product of the branching fractions of $ψ(3686) …

Observation of $D^{+}\to K_{S}^{0}a_{0}(980)^{+}$ in the amplitude analysis of $D^{+} \to K_{S}^{0}π^+η$

BESIII Collaboration, M. N. Achasov, P. Adlarson, O. Afedulidis et autres

We perform for the first time an amplitude analysis of the decay $D^{+}\to K_{S}^{0}π^+η$ and report the observation of the decay $D^{+}\to K_{S}^{0}a_{0}(980)^{+}$ using 2.93 fb$^{-1}$ of $e^+e^-$ collision data taken at a center-of-mass energy of 3.773 GeV with the BESIII detector. …

Search for the weak decays J / ψ → D s ( * ) − e + ν e + c . c .

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

Using a sample of $2.25\ifmmode\times\else\texttimes\fi{}1{0}^{8}$ $J/\ensuremath{\psi}$ events collected with the BESIII detector at the BEPCII collider, we search for the $J/\ensuremath{\psi}$ semileptonic weak decay $J/\ensuremath{\psi}\ensuremath{\rightarrow}{D}_{s}^{\ensuremath{-}}{e}^{+}{\ensuremath{\nu}}_{e}+\mathrm{c}.\mathrm{c}.$ with a much higher sensitivity than previous searches. We also perform the first search for $J/\ensuremath{\psi}\ensuremath{\rightarrow}{D}_{s}^{*\ensuremath{-}}{e}^{+}{\ensuremath{\nu}}_{e}+\mathrm{c}.\mathrm{c}.$ No …

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

Observation of the decay ψ(3686)→ΛΣ¯±π∓+c.c.

M. N. Achasov, X. Ai, O. Albayrak, D. Ambrose et autres

Using a sample of $1.06\ifmmode\times\else\texttimes\fi{}{10}^{8}$ $\ensuremath{\psi}(3686)$ events collected with the BESIII detector, we present the first observation of the decays of $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{c}.\mathrm{c}.$ and $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}+\mathrm{c}.\mathrm{c}.$ The branching fractions are measured to be $\mathcal{B}(\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{c}.\mathrm{c}.)=(1.40\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.13)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and $\mathcal{B}(\ensuremath{\psi}(3686)\ensuremath{\rightarrow}\ensuremath{\Lambda}{\overline{\ensuremath{\Sigma}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}+\mathrm{c}.\mathrm{c}.)=(1.54\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.13)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, where the first errors are statistical and the …

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