@article{3185907,
    title = "p-p, p-Lambda, and Lambda-Lambda correlations studied via femtoscopy in
pp reactions at root s=7 TeV",
    author = "Acharya, S. and Adamova, D. and Adolfsson, J. and Aggarwal, M. M. and and Rinella, G. Aglieri and Agnello, M. and Agrawal, N. and Ahammed, Z. and and Ahn, S. U. and Aiola, S. and Akindinov, A. and Al-Turany, M. and Alam, and S. N. and Albuquerque, D. S. D. and Aleksandrov, D. and Alessandro, B. and and Alfaro Molina, R. and Ali, Y. and Alici, A. and Alkin, A. and Alme, and J. and Alt, T. and Altenkamper, L. and Altsybeev, I and Anaam, M. N. and and Andrei, C. and Andreou, D. and Andrews, H. A. and Andronic, A. and and Angeletti, M. and Anguelov, V and Anson, C. and Anticic, T. and and Antinori, F. and Antonioli, P. and Anwar, R. and Apadula, N. and and Aphecetche, L. and Appelshaeuser, H. and Arcelli, S. and Arnaldi, R. and and Arnold, O. W. and Arsene, I. C. and Arslandok, M. and Augustinus, A. and and Averbeck, R. and Azmi, M. D. and Badala, A. and Baek, Y. W. and and Bagnasco, S. and Bailhache, R. and Bala, R. and Baldisseri, A. and Ball, and M. and Baral, R. 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    journal = "Physical Review C",
    year = "2019",
    volume = "99",
    number = "2",
    publisher = "AMER PHYSICAL SOC",
    issn = "2469-9985, 2469-9993",
    doi = "10.1103/PhysRevC.99.024001",
    abstract = "We report on the first femtoscopic measurement of baryon pairs, such as
p-p, p-Lambda, and Lambda-Lambda, measured by ALICE at the Large Hadron
Collider (LHC) in proton-proton collisions at root s = 7 TeV. This study
demonstrates the feasibility of such measurements in pp collisions at
ultrarelativistic energies. The femtoscopy method is employed to
constrain the hyperon-nucleon and hyperon-hyperon interactions, which
are still rather poorly understood. A new method to evaluate the
influence of residual correlations induced by the decays of resonances
and experimental impurities is hereby presented. The p-p, p-Lambda, and
Lambda-Lambda correlation functions were fitted simultaneously with the
help of a new tool developed specifically for the femtoscopy analysis in
small colliding systems: Correlation Analysis Tool using the Schrodinger
equation (CATS). Within the assumption that in pp collisions the three
particle pairs originate from a common source, its radius is found to be
equal to r(0) = 1.125 +/- 0.018 (stat)(-0.035)(+0.058) (syst) fm. The
sensitivity of the measured p-Lambda correlation is tested against
different scattering parameters, which are defined by the interaction
among the two particles, but the statistics is not sufficient yet to
discriminate among different models. The measurement of the
Lambda-Lambda correlation function constrains the phase space spanned by
the effective range and scattering length of the strong interaction.
Discrepancies between the measured scattering parameters and the
resulting correlation functions at LHC and RHIC energies are discussed
in the context of various models."
}