2012
article
OpenAlex
F. De Mori, Mikhail N. Achasov, D. J. Ambrose, F. F. An et autres
Using a sample of $106×10^6$ $\\psi(3686)$ events collected with the BESIII detector at the BEPCII storage ring, we have made the first measurement of the $M1$ transition between the radially excited charmonium $S-wave$ spin-triplet and the radially excited $S-wave$ spin-singlet states: $\\psi(3686)→\\gamma\\eta_c …
2012
article
OpenAlex
F. De Mori, Mikhail N. Achasov, 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 …