Using a sample of $(448.1pm2.9) imes10^6$ $psi(3686)$ events collected with the BESIII detector, we perform the first partial wave analysis of $psi(3686) ightarrow K^+K^-eta$. In addition to the well established states, $phi(1020)$, $phi(1680)$, and $K_3^*(1780)$, contributions from $X(1750)$, $ ho(2150)$, $ ho_3(2250)$, and $K^*_2(1980)$ are also observed. The $X(1750)$ state is determined to be a $1^--$ resonance. The simultaneous observation of the $phi(1680)$ and $X(1750)$ indicates that the $X(1750)$, with previous observations in photoproduction, is distinct from the $phi(1680)$. The masses, widths, branching fractions of $psi(3686) ightarrow K^+K^-eta$ and the intermediate resonances are also measured.
Partial wave analysis of ψ(3686)→K+K−η
An, Q.;Cao, N.;Chen, G.;De Mori, F.;Felici, G.;Ji, Q.;Jin, S.;Li, Ke;Li, Lei;Liu, D.;Pacetti, S.;Wilkinson, G.;Yu, T.;
2020
Abstract
Using a sample of $(448.1pm2.9) imes10^6$ $psi(3686)$ events collected with the BESIII detector, we perform the first partial wave analysis of $psi(3686) ightarrow K^+K^-eta$. In addition to the well established states, $phi(1020)$, $phi(1680)$, and $K_3^*(1780)$, contributions from $X(1750)$, $ ho(2150)$, $ ho_3(2250)$, and $K^*_2(1980)$ are also observed. The $X(1750)$ state is determined to be a $1^--$ resonance. The simultaneous observation of the $phi(1680)$ and $X(1750)$ indicates that the $X(1750)$, with previous observations in photoproduction, is distinct from the $phi(1680)$. The masses, widths, branching fractions of $psi(3686) ightarrow K^+K^-eta$ and the intermediate resonances are also measured.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
