@article{3032710,
    title = "Kaon-proton strong interaction at low relative momentum via femtoscopy
in Pb-Pb collisions at the LHC",
    author = "Acharya, S. and Adamova, D. and Adler, A. and Adolfsson, J. and Rinella, and G. Aglieri and Agnello, M. and Agrawal, N. and Ahammed, Z. and Ahmad, S. and and Ahn, S. U. and Ahuja, I and Akbar, Z. and Akindinov, A. and and Al-Turany, M. and Alam, S. N. and Aleksandrov, D. and Alessandro, B. and and Alfanda, H. M. and Alfaro Molina, R. and Ali, B. and Ali, Y. and Alici, and A. and Alizadehvandchali, N. and Alkin, A. and Alme, J. and Alt, T. and and Altenkamper, L. and Altsybeev, I and Anaam, M. N. and Andrei, C. and and Andreou, D. and Andronic, A. and Angeletti, M. and Anguelov, V and and Antinori, F. and Antonioli, P. and Anuj, C. and Apadula, N. and and Aphecetche, L. and Appelshaeuser, H. and Arcelli, S. and Arnaldi, R. and and Arsene, I. C. and Arslandok, M. and Augustinus, A. and Averbeck, R. and and Aziz, S. and Azmi, M. D. and Badala, A. and Baek, Y. 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    journal = "PHYSICS LETTERS B",
    year = "2021",
    volume = "822",
    publisher = "Elsevier",
    issn = "0370-2693",
    doi = "10.1016/j.physletb.2021.136708",
    abstract = "In quantum scattering processes between two particles, aspects
characterizing the strong and Coulomb forces can be observed in
kinematic distributions of the particle pairs. The sensitivity to the
interaction potential reaches a maximum at low relative momentum and
vanishing distance between the two particles. Ultrarelativistic
heavy-ion collisions at the LHC provide an abundant source of many
hadron species and can be employed as a measurement method of scattering
parameters that is complementary to scattering experiments. This study
confirms that momentum correlations of particles produced in Pb-Pb
collisions at the LHC provide an accurate measurement of kaon-proton
scattering parameters at low relative momentum, allowing precise access
to the K- p -> K- p process. This work also validates the femtoscopic
measurement in ultrarelativistic heavy-ion collisions as an alternative
to scattering experiments and a complementary tool to the study of
exotic atoms with comparable precision. In this work, the first
femtoscopic measurement of momentum correlations of K- p (K+(p) over
bar) and K+p (K-(p) over bar) pairs in Pb-Pb collisions at
centre-of-mass energy per nucleon pair of root sNN = 5.02 TeV registered
by the ALICE experiment is reported. The components of the K- p complex
scattering length are extracted and found to be Rf(0) = -0.91 +/-
0.03(stat)(-0.03)(+0.17) (syst) and Sf(0) = 0.92 +/-
0.05(stat)(-0.33)(+0.12)(syst). The results are compared with chiral
effective field theory predictions as well as with existing data from
dedicated scattering and exotic kaonic atom experiments. (C) 2021 ALICE,
European Organization for Nuclear Research. Published by Elsevier B.V."
}