Figure 4

First three non-vanishing components of the SH representation of the $\pi^+\pi^+$ correlation functions for a selected multiplicity and $k_{\rm T}$ range, compared to a calculation from EPOS 3.076 (generator level only) and PYTHIA 6.4 Perugia-0 tune for pp at $\sqrt{s}=7$ TeV (full simulation with detector response)