Glauber-Lachs formula-based analysis of three-pion Bose-Einstein correlation data at 7 TeV from the LHCb Collaboration

We combine the Glauber--Lachs formula from quantum optics and the two-component picture for pion production to analyze data on two- and three-pion Bose--Einstein correlation at 7 TeV from the LHCb Collaboration. For the pion exchange function $E_{\rm 2B}$, we chose a dipole form and an inverse one-and-a-half pole form. The extensions are computed in the configuration space of 4-dimensional Euclidean space ($\xi=\sqrt{|\bm r_1-\bm r_2|^2+(t_1-t_2)^2}$).