Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Search for hexaquark or di-baryon state at BESIII

Jun 5, 2023, 2:50 PM
DAD - Room 4H (Genova, Italy)

DAD - Room 4H

Genova, Italy

Contributed Exotic hadrons and candidates Exotic hadrons and candidates


Bo Zheng (University of South China)


Using the data sets above 4.0 GeV collected by the BESIII detector on the Beijing Positron Electron Collider, which corresponds a total integrated luminosity greater than 1.5fb-1, the hexaquark or di-baryon state is searched through e+ e- -> 2(p pbar)and e+ e- -> p p pbar nbar pi- + c.c.. We observed these two final states for the first time, and the Born cross sections ofe+ e- -> 2(p pbar)have been measuredin 23center-of-mass energies ranges between 4.009 and 4.6 GeV. The average Born cross sections of the e+ e- -> p p pbar nbar pi- + c.c.within the energy range of (4.160, 4.380) GeV, (4.400, 4.600) GeV and (4.610, 4.700) GeV are measured. By fitting the invariant mass spectra of pn,pppiand pp, we found that their lineshape areconsistent with the phase space distribution, no significant resonance structures were found.

Primary author

Beijiang Liu (Institute of High Energy Physics)

Presentation materials