Figure 2

< p> Source radius r$_0$ as a function of $\langle \mt \rangle$ for the assumption of a purely Gaussian source. The blue crosses result from fitting the \pP correlation function with the strong Argonne $v_{18}$~ potential. The green squared crosses (red diagonal crosses) result from fitting the \pL correlation functions with the strong $\chi$EFT LO~ (NLO~) potential. Statistical (lines) and systematic (boxes) uncertainties are shown separately.< /p>