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

Abstract

Using $e^{+}{e}^{-}$ collision data corresponding to a total integrated luminosity of 20 ${\mathrm{fb}}^{-1}$ collected with the BESIII detector at the BEPCII collider, we present a measurement of the Born cross section for the process $e^{+}{e}^{-}\to p{K}^{-}{K}^{-}\bar{\hat{I}}{ž}^{+}$ 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 $e^{+}{e}^{-}\to p{K}^{-}{K}^{-}\bar{\hat{I}}{ž}^{+}$ with a power law function for continuum production and one resonance at a time for the $\ddot{I}ˆ(3770)$, $\ddot{I}ˆ(4040)$, $\ddot{I}ˆ(4160)$, $\ddot{I}ˆ(4230)$, $\ddot{I}ˆ(4360)$, $\ddot{I}ˆ(4415)$ or $\ddot{I}ˆ(4660)$, respectively, the upper limits for the product of partial electronic width and branching fraction into the final state $p{K}^{-}{K}^{-}\bar{\hat{I}}{ž}^{+}$ for these resonances are determined at the $90\%$ confidence level.

21 pages, 2 figures, consistent with the publication in JHEP11(2025)111