Speaker
Qinghua He
(Nanjing University of Aeronautics and Astronautics)
Description
The space-time properties of the excited nucleons may provide useful information to test the non-perturbative QCD models attempting to describe the hadron production process. In this work we attempt to measure the excited baryon Δ(1232)‘s radius using Bose-Einstein correlations (BEC) between two neutral pions from photo-production off a hydrogen/deuterium target at the incident photon energies around 1 GeV carried out at the Research Center for Electron Photon Science (ELPH) in Tohoku University with a 4π electromagnetic calorimeter complex, named FOREST. For this end, we try to establish a new BEC observing model to extract radius information from BEC effects in the presence of resonance decays and to develop an event mixing technique for measuring low-multiplicity BEC effects through adding additional mixing constraints to delicately deal with the influence of non-BEC correlations arising from global conservation laws and resonance decays.
Primary author
Qinghua He
(Nanjing University of Aeronautics and Astronautics)
