Study of $e^+e^-\to\eta\phi$ at center-of-mass energies from 3.773 to 4.600 GeV

TL;DR

This study measures the cross sections of the process e+e- to eta phi across various energies to search for charmonium-like states, finding no significant evidence of the Y(4230) and Y(4360) resonances.

Contribution

First comprehensive measurement of e+e- to eta phi cross sections over 3.773-4.600 GeV with no observed signals of specific charmonium-like states.

Findings

No significant signals of Y(4230) and Y(4360) resonances.

Precise cross-section measurements at multiple energies.

Constraints on models predicting these resonances.

Abstract

We present a study of the process $e^{+}e^{-}\to\eta\phi$ using data samples collected with the BESIII detector corresponding to an integrated luminosity of 15.03 fb$^{-1}$ at 23 center-of-mass energies from 3.773 to 4.600 GeV. The Born cross sections are measured at each energy and a coherent fit to cross-section lineshape is performed using a Breit-Wigner parametrization to search for charmonium-like vector states. No significant signals of the $Y(4230)$ and $Y(4360)$ resonances are observed.