We report on an investigation of the (π−,π0π0) reaction by means of measurements of the π0π0 invariant mass distributions from π− interactions on H, D, C, Al, and Cu targets at pπ− = 0.408GeV/c. The sharp, strong peak in the π+π− invariant mass near 2mπ reported by the CHAOS Collaboration is not seen in our π0π0 data. However, we do observe a change in the shape of the π0π0 invariant mass spectrum for the different targets, indicating that the π0π0 interaction diminishes in the nuclear medium as represented by nuclei D, C, Al, and Cu, compared to hydrogen.
ASJC Scopus subject areas
- Physics and Astronomy(all)