Measurement of cross section for e+e- → Ξ0(Ξ)over-bar0 near threshold

Using e(+)e(-) collision data at ten center-of-mass energies between 2.644 and 3.080 GeV collected with the BESIII detector at BEPCII and corresponding to an integrated luminosity of about 500 pb(-1), we measure the cross sections and effective form factors for the process e(+)e(-) -> Xi(0)(Xi) over bar (0) utilizing a single-tag method. A fit to the cross section of e(+)e(-) -> Xi(0)(Xi) over bar (0) with a pQCD-driven power function is performed, from which no significant resonance or threshold enhancement is observed. In addition, the ratio of cross sections for the processes e(+)e(-) -> Xi(0)(Xi) over bar (0) and Xi(0)(Xi) over bar (0) is calculated using recent BESIII measurement and is found to be compatible with expectation from isospin symmetry. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

In this study, e(+)e(-) collision data at various center-of-mass energies were analyzed using the BESIII detector at BEPCII. The cross sections and form factors for the specific process were measured, and no significant resonance or threshold enhancement was observed. The calculated cross section ratio was found to be consistent with expectations from isospin symmetry.