Measurement of the Born cross section for $e^+e^- \to p K^- K^- \bar{\Xi}^+$ at $\sqrt{s} =$ 3.5-4.9 GeV

TL;DR

This study measures the cross section of a specific electron-positron collision process across various energies, identifying potential resonance contributions and setting upper limits on their electronic widths and decay probabilities.

Contribution

First measurement of the $e^+e^- o p K^- K^- ar{ ext{ extXi}}^+$ cross section over 3.5-4.9 GeV energies using BESIII data, with resonance analysis and upper limit determinations.

Findings

Cross section measured at 39 energies between 3.5 and 4.9 GeV.

Upper limits set for resonance contributions to the final state.

No significant resonance signals observed in the data.

Abstract

Using $e^+ e^-$ collision data corresponding to a total integrated luminosity of 20 ${\rm fb}^{-1}$ collected with the BESIII detector at the BEPCII collider, we present a measurement of the Born cross section for the process $e^+e^- \to p K^-K^-\bar{\Xi}^{+}$ at 39 center-of-mass energies between 3.5 and 4.9 GeV with a partial reconstruction technique. By performing a fit to the dressed cross section of $e^{+}e^{-}\to p K^- K^-\bar{\Xi}^{+}$ with a power law function for continuum production and one resonance at a time for the $\psi(3770)$, $\psi(4040)$, $\psi(4160)$, $\psi(4230)$, $\psi(4360)$, $\psi(4415)$ or $\psi(4660)$, respectively, the upper limits for the product of partial electronic width and branching fraction into the final state $p K^- K^- \bar{\Xi}^+$ for these resonances are determined at the $90\%$ confidence level.