Event-shape and multiplicity dependence of freeze-out radii in pp collisions at $\sqrt{{\textit s}}=7$ TeV
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The ALICE collaboration

Abstract (data abstract)
CERN-LHC. Comparison of measured and simulated opposite-sign pion pair correlation functions for high and low sphericity intervals. The C(q) in spherical events are relatively flat at unity, while the low sphericity correlation functions exhibit a very pronounced slope. This finding supports previous assumptions about the mini-jet origin of background correlations in interferometry analyses and demonstrates that PYTHIA describes two-pion correlations well in the absence of Bose-Einstein correlations.

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