Search for $e^{+}e^{-} \to \phi \chi_{c0}$ and $\phi\eta_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV

TL;DR

This study searches for specific electron-positron collision processes involving phi mesons and charmonium states at energies from 4.47 to 4.95 GeV, setting upper limits due to no significant signals observed.

Contribution

First search for $e^{+}e^{-} o \, \phi \chi_{c0}$ and $\phi \eta_{c2}(1D)$ processes in this energy range, providing constraints on their production cross sections and related parameters.

Findings

No significant signals detected for the targeted processes.

Upper limits established on production cross sections and branching fraction products.

The product of the electronic width of $Y(4660)$ and its decay branching fraction is constrained to be less than 0.40 eV.

Abstract

Utilizing a data set of $6.7$ fb$^{-1}$ from electron-positron collisions recorded by the BESIII detector at the BEPCII storage ring, a search is conducted for the processes $e^{+}e^{-} \to \phi \chi_{c0}$ and $\phi\eta_{c2}(1D)$ across center-of-mass energies from 4.47 to 4.95 GeV. In the absence of any significant signals, upper limits are set. These include limits on the Born cross sections for $e^{+}e^{-} \to \phi \chi_{c0}$, as well as the product of the Born cross section for $e^{+}e^{-} \to \phi\eta_{c2}(1D)$ and a sum of five branching fractions. Furthermore, the product of the electronic width of $Y(4660)$ and the branching fraction of the $Y(4660) \to \phi\chi_{c0}$, denoted as $\Gamma^{Y(4660)}_{e^{+}e^{-}} \mathcal{B}_{Y(4660) \to \phi\chi_{c0}}$, is determined to be $< 0.40$ eV at the 90\% confidence level.