CMS-PAS-HIN-21-006

CMS-PAS-HIN-21-006
Two-particle femtoscopic correlation measurements of $\mathrm{K^{0}_{S}}$ and $\Lambda (\overline{\Lambda})$ particles in PbPb collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}}=$ 5.02 TeV
CMS Collaboration
June 2022

Abstract: Two-particle correlations as a function of relative momentum are presented for $\mathrm{K^{0}_{S}}$ , $\Lambda$ , and $\overline{\Lambda}$ strange hadrons produced in lead-lead collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}}=$ 5.02 TeV. The data were obtained using the CMS detector at the LHC. Such correlations are sensitive to quantum statistics and to possible final-state interactions between the particles. Source radii extracted from $\mathrm{K^{0}_{S}K^{0}_{S}}$ correlations in different centrality regions are found to decrease in going from central to peripheral collisions. Strong-interaction scattering parameters (i.e., scattering length and effective range) are determined from $\Lambda\mathrm{K^{0}_{S}}\oplus\overline{\Lambda}\mathrm{K^{0}_{S}}$ and $\Lambda\Lambda\oplus\overline{\Lambda}\overline{\Lambda}$ correlations using the Lednicky-Lyuboshits model and compared to other experimental and theoretical results.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PLB. The superseded preliminary plots can be found here.

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