Z. H. Zhang

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

BESIII Collaboration, Mikhail N. Achasov, 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) …

Study of the decay and production properties of $D_{s1}(2536)$ and $D_{s2}^*(2573)$

Mikhail N. Achasov, P. Adlarson, O. Afedulidis, X. C. Ai et autres

The $e^+e^-\rightarrow D_s^+D_{s1}(2536)^-$ and $e^+e^-\rightarrow D_s^+D^*_{s2}(2573)^-$ processes are studied using data samples collected with the BESIII detector at center-of-mass energies from 4.530 to 4.946~GeV. The absolute branching fractions of $D_{s1}(2536)^- \rightarrow \bar{D}^{*0}K^-$ and $D_{s2}^*(2573)^- \rightarrow \bar{D}^0K^-$ are measured for the first time …

Projected WIMP sensitivity of the CDEX-50 dark matter experiment

X. P. Geng, L. T. Yang, Q. Yue, K. Kang et autres

CDEX-50 is a next-generation project of the China Dark Matter Experiment (CDEX) that aims to search for dark matter using a 50-kg germanium detector array. This paper comprises a thorough summary of the CDEX-50 dark matter experiment, including an investigation of potential …

cn, tw, jp, in (code pays fourni par la source)

Measurements of Differential Cross Sections of Inclusive $π^0$ and $K^0_S$ Production in $e^{+}e^{-}$ Annihilation at Energies from 2.2324 to 3.6710 GeV

BESIII Collaboration, M. Ablikim, Mikhail N. Achasov, P. Adlarson et autres

Based on electron positron collision data collected with the BESIII detector operating at the BEPCII storage rings, the differential cross sections of inclusive $π^0$ and $K^0_S$ production as a function of hadron momentum, normalized by the total cross section of the $e^{+}e^{-} …

Search for invisible decays of a dark photon using $e^+e^-$ annihilation data at BESIII

BESIII Collaboration, M. Ablikim, Mikhail N. Achasov, P. Adlarson et autres

We report a search for a dark photon using $14.9$~fb$^{-1}$ of $e^+e^-$ annihilation data taken at center-of-mass energies from 4.13 to 4.60~GeV with the BESIII detector operated at the BEPCII storage ring. The dark photon is assumed to be produced in the …