Charged kaon femtoscopic correlations in pp collisions at $\sqrt{s}=7$ TeV

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7 TeV
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Correlations of two charged identical kaons (Kch Kch) are measured in
pp collisions at sqrt{s}=7 TeV by the ALICE experiment
at the Large Hadron Collider (LHC). One-dimensional Kch Kch correlation
functions are constructed in three multiplicity and four transverse momentum ranges.
The Kch Kch femtoscopic source parameters R and lambda are extracted.
The Kch Kch correlations show a slight increase of femtoscopic radii with
increasing multiplicity and a slight decrease of radii with increasing transverse
momentum. These trends are similar to the ones observed for pi pi and Ks0 Ks0 correlations in pp and heavy-ion
collisions. However, the observed one dimensional correlation radii for charged kaons are
larger at high multiplicities than those for pions in contrast to what was observed in
heavy-ion collisions at RHIC.