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

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.