Xiaowu Zhu

Residual welding stresses in the pipe-bar joints of a rotary drilling rig

Haiyan Zhao, Xingquan Xu, Xingzhe Yu, Xiaowu Zhu

Study of $J/{\psi}{\rightarrow}p\bar{p}$ and $J/{\psi}{\rightarrow}n\bar{n}$

F. De Mori, М. Н. Ачасов, D. Ambrose, F. F. An et autres

The decays $J/{\\psi}{\\rightarrow}p\\bar{p}$ and $J/{\\psi}{\\rightarrow}n\\bar{n}$ have been investigated with a sample of $225.2×10^6$ $J/{\\psi}$ events collected with the BESIII detector at the BEPCII $e^+e^-$ collider. The branching fractions are determined to be $\\mathscr{B}(J/{\\psi}{\\rightarrow}p\\bar{p})=(2.112±0. 004±0.031)×10^{-3}$ and $\\mathscr{B}(J/{\\psi}{\\rightarrow}n\\bar{n})=(2.07±0.01±0.17)×10^{-3}$. Distributions of the angle $\\theta$ between …