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Femtoscopic study of the S=−1 meson-baryon interaction: K−p, π−Λ, and K+Ξ− correlations

P. Encarnación1,2,*, A. Feijoo3,4,†, V. Mantovani Sarti3,‡, and A. Ramos1,§

  • *Contact author: Pablo.Encarnacion@ific.uv.es
  • †Contact author: edfeijoo@ific.uv.es
  • ‡Contact author: valentina.mantovani-sarti@tum.de
  • §Contact author: ramos@fqa.ub.edu
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Phys. Rev. D 111, 114013 – Published 17 June, 2025Erratum Phys. Rev. D 113, 099901 (2026)

DOI: https://doi.org/10.1103/3ycr-vzmd

Abstract

We study the femtoscopic correlation functions of meson-baryon pairs in the strangeness S=−1 sector, employing unitarized s-wave scattering amplitudes derived from the chiral Lagrangian up to next-to-leading order. For the first time, we deliver predictions on the π−Λ and K+Ξ− correlation functions which are feasible to be measured at the Large Hadron Collider. We also demonstrate that the employed model is perfectly capable of reproducing the K−p correlation function data measured by the same collaboration, without the need to modify the coupling strength to the K¯0n channel, as has been recently suggested. In all cases, the effects of the source size on the correlation are tested. In addition, we present detailed analysis of the different coupled-channel contributions, together with the quantification of the relative relevance of the different terms in the interaction. These calculations require the knowledge of the so-called production weights, for which we present two novel methods to compute them.

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Erratum

Erratum: Femtoscopic study of the S=−1 meson-baryon interaction: K−p, π−Λ, and K+Ξ− correlations [Phys. Rev. D 111, 114013 (2025)]

P. Encarnación, A. Feijoo, V. Mantovani Sarti, and A. Ramos
Phys. Rev. D 113, 099901 (2026)

Article Text

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Phys. Rev. D 111, 114013– Published 17 June, 2025
  • Received 30 December 2024
  • Accepted 29 May 2025
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