Measurement of the e+e- →p p ¯ π0 cross section at s =2.1000-3.0800 GeV

The process e+e-→pp¯π0 is studied at 20 center-of-mass energies ranging from 2.1000 to 3.0800 GeV using 636.8 pb-1 of data collected with the BESIII detector operating at the BEPCII collider. The Born cross sections for e+e-→pp¯π0 are measured with high precision. Since the lowest center-of-mass energy, 2.1000 GeV, is less than 90 MeV above the pp¯π0 energy threshold, we can probe the threshold behavior for this reaction. However, no anomalous threshold enhancement is found in the cross sections for e+e-→pp¯π0.