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

Abstract

Correlations of two charged identical kaons (${\mathrm{K}}^{\mathrm{ch}}{\mathrm{K}}^{\mathrm{ch}}$) are measured in pp collisions at $\sqrt{s}=7$~TeV by the ALICE experiment at the Large Hadron Collider (LHC). One-dimensional ${\mathrm{K}}^{\mathrm{ch}}{\mathrm{K}}^{\mathrm{ch}}$ correlation functions are constructed in three multiplicity and four transverse momentum ranges. The ${\mathrm{K}}^{\mathrm{ch}}{\mathrm{K}}^{\mathrm{ch}}$ femtoscopic source parameters $R$ and $\lambda$ are extracted. The ${\mathrm{K}}^{\mathrm{ch}}{\mathrm{K}}^{\mathrm{ch}}$ 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 ${\mathrm{K}}_{\mathrm{s}}^0{\mathrm{K}}_{\mathrm{s}}^0$ correlations in pp and heavy-ion collisions. However at high multiplicities, there is an indication that the one-dimensional correlation radii for charged kaons are larger than those for pions in contrast to what was observed in heavy-ion collisions at RHIC.

17 pages, 4 captioned figures, 1 table, authors from page 12, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/2840

References in corpus (3)

• PYTHIA 6.4 Physics and Manual
• K${}_s^0$K${}_s^0$ correlations in pp collisions at $\sqrt{s}=7$ TeV from the LHC ALICE experiment
• Bose-Einstein Correlations in a Fluid Dynamical Scenario for Proton-Proton Scattering at 7 TeV

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