Study of $e^+e^- \to 2(p\bar{p})$ at center-of-mass energies between 4.0 and 4.6 GeV

TL;DR

This study measures the cross sections of the process $e^+e^- o 2(par{p})$ at energies between 4.0 and 4.6 GeV, finding no significant structures or exotic states, thus providing first-time measurements in this energy range.

Contribution

First measurement of $e^+e^- o 2(par{p})$ cross sections at these energies with no observed resonant structures or exotic baryon states.

Findings

Measured cross sections at 23 energies between 4.0 and 4.6 GeV.

No significant resonant structures observed in the lineshape.

Invariant mass spectra consistent with phase space, no exotic states found.

Abstract

Using data taken at 23 center-of-mass energies between 4.0 and 4.6 GeV with the BESIII detector at the BEPCII collider and with a total integrated luminosity of approximately $15$ fb$^{-1}$, the process $e^+e^-\to 2(p \bar{p})$ is studied for the first time. The Born cross sections for $e^+e^-\to 2(p \bar{p})$ are measured, and no significant structure is observed in the lineshape. The baryon pair ($pp$ and $\bar{p}\bar{p}$) invariant mass spectra are consistent with phase space, therefore no hexaquark or di-baryon state is found.