Figure 3

$\lambda$-parameters of ${\rm K}^{\rm ch}{\rm K}^{\rm ch}$ versus $m_{\rm T}$ extracted by fitting correlation functions shown in Fig.[2] to Eq.[1] and the baseline to Eq.[2]. For comparison the ${\rm K}^0_{\rm s}{\rm K}^0_{\rm s}$ $\lambda$-parameters measured by ALICE in 7 TeV pp collisions are also shown. Statistical (darker lines) and total errors are shown. The points corresponding to the second and third multiplicity bins are offset by 0.03 GeV/$c^2$ for clarity.