Figure 2

The K$^+$K$^-$ experimental correlation functions corrected for non-flat baselines according to Eq. (\ref{eq:baseline})as a function of pair relative momentum $q$. The CFs are presented in threecentrality classes (rows): 0--10\%, 10\mbox{--}30\%, and 30--50\% and three pair transverse momentum $k_{\rm T}$ bins (columns): (0.3--0.4), (0.5--0.6) and (0.8\mbox{--}1.0) GeV/$c$ Statistical (bars) and systematic (boxes) uncertainties are shown. The red line shows thefit of the CF with the Lednick\'y--Lyuboshitz parametrization (Eq. (\ref{eq:Cfsi})) using free parameters (mass and couplings) for $f_0$(980) and Achasov  parameters for $a_0$(980) in the $0< q gev="" range="" the="" dashed-dotted="" lines="" correspond="" to="" baseline="" from="" eq.=""> < /q>