Results are presented for pion interferometry measurements of 1.2A GeV La+La at the Lawrence Berkeley Laboratory Heavy Ion Spectrometer System. The experiment's acceptance is at forward angles in the center-of-mass system. The fit parameters R, τ, λ, R, and R are presented. The extracted shape of the pion source is oblate. The correlation between the extracted size of the pion source and the centrality of the collision is investigated as well as the dependence of the source size on the mean momentum of the pion pairs. We conclude that the fitted radius parameters scale with mass for symmetric systems. We observe a dependence of the fitted size of the pion source on the mean momentum of the pion pairs. Comparisons are made with previous results.
Bibliographical noteFunding Information:
This study was supported in part by Research for the Future Program (RFTF) JSPS-RFTF 98L00201 from the Japan Society for the Promotion of Science (JSPS), by a Grant-in-Aid for Scientific Research on Priority Areas (C)-Advanced Brain Science Project-from the Ministry of Education, Culture, Science, Sports and Technology of Japan to Y.W. (13210120), and by Project Research Grants of Kyorin University to R.K. (00-03-03).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics