Speaker
Mr
ZHENGQIAO ZHANG
(BNL)
Description
The two-particle correlation at small relative momenta is influenced by the nuclear force between two particles, which has been intensively studied for nucleons or nuclei but not much for anti-nucleons or anti-nuclei. In this talk, we present the (anti)proton-(anti)proton correlation function in Au+Au collisions at \sqrt{s_{NN}} = 200 GeV based on data taken by the STAR experiment at RHIC. We show the attractive nuclear force between two anti-protons, and present the measurement of the two key parameters that characterize the corresponding strong interaction, namely, the scattering length and the effective range. Our measurement serves as a useful verification of CPT symmetry. Of equal importance as a direct knowledge of the interaction among two anti-protons, the simplest system of antinucleons(nuclei), our result provides a fundamental ingredient towards understanding the structure of more sophisticated anti-nuclei and their properties.
Primary author
Mr
ZHENGQIAO ZHANG
(BNL)
