dc.description.abstract | We report on the measurement of the size of the particle-emitting source from two-baryon correlations
with ALICE in high-multiplicity pp collisions at √s = 13 TeV. The source radius is studied with low
relative momentum p–p, p–p, p–, and p– pairs as a function of the pair transverse mass mT
considering for the first time in a quantitative way the effect of strong resonance decays. After correcting
for this effect, the radii extracted for pairs of different particle species agree. This indicates that protons,
antiprotons, s, and s originate from the same source. Within the measured mT range (1.1–2.2) GeV/c2
the invariant radius of this common source varies between 1.3 and 0.85 fm. These results provide
a precise reference for studies of the strong hadron–hadron interactions and for the investigation of
collective properties in small colliding systems | en |