@article{oai:soar-ir.repo.nii.ac.jp:00017414, author = {MIZOGUCHI, T. and BIYAJIMA, M. and KAGEYA, T.}, journal = {信州大学教養部紀要.}, month = {Mar}, note = {We consider several source functions in the Bose-Einstein correlations (BEC) and show their interrelations between 4-dimensional and 3-dimensional configuration space. We use two frameworks, i.e., a conventional one and that of the laser optical (LO) approach. The data of the BEC by NA44 Collaboration are analysed by our formulae. It is found that the BEC expressed by the Gaussian distribution, an exponential function and power functions of Lorentzian show almost the same x² - values in both frameworks. From estimated values of the root mean square in the conventional formula, Rrms=√<γ²> ), the following physical picture is obtained: 1.2A^⅓_τ