# One-dimensional charged kaon femtoscopy in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

## TL;DR

This study measures charged kaon correlations in p-Pb collisions at 5.02 TeV, revealing how femtoscopic radii depend on multiplicity and transverse momentum, and compares results with other collision systems and models.

## Contribution

First measurement of charged kaon femtoscopy in p-Pb collisions at 5.02 TeV, providing insights into particle emission sources and model validation.

## Key findings

- Femtoscopic radii increase with multiplicity.
- Radii decrease with pair transverse momentum.
- Results align with EPOS 3 model predictions.

## Abstract

The correlations of identical charged kaons were measured in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV by the ALICE experiment at the LHC. The femtoscopic invariant radii and correlation strengths were extracted from one-dimensional kaon correlation functions and were compared with those obtained in pp and Pb-Pb collisions at $\sqrt{s}=7$ TeV and $\sqrt{s_{\rm NN}}=2.76$ TeV, respectively. The presented results also complement the identical-pion femtoscopic data published by the ALICE collaboration. The extracted radii increase with increasing charged-particle multiplicity and decrease with increasing pair transverse momentum. At comparable multiplicities, the radii measured in p-Pb collisions are found to be close to those observed in pp collisions. The obtained femtoscopic parameters are reproduced by the EPOS 3 hadronic interaction model and disfavor models with large initial size or strong collective expansion at low multiplicities.