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SergioVermunt, LuukVernet, RenaudVertesi, RobertVickovic, LindaViinikainen, Jussi SamuliVilakazi, ZabulonVillalobos Baillie, OrlandoVillatoro Tello, AbrahamBhom, JihyunVinogradov, AlexanderVirgili, TizianoVislavicius, VytautasVodopyanov, AlexanderVolkl, Martin AndreasVoloshin, KirillVoloshin, SergeyVolpe, GiacomoVon Haller, BarthelemyVorobyev, IvanBianchi, AntonioVoscek, DominikVranic, DaniloVrlakova, JankaWagner, BorisWang, HongkaiWang, MengliangWatanabe, YosukeWeber, MichaelWeber, Steffen GeorgWegrzynek, AdamBianchi, LivioWeiser, Dennis FranzWenzel, Sandro ChristianWessels, Johannes PeterWesterhoff, UweWhitehead, Andile MothegiWiechula, JensWikne, JonWilk, Grzegorz AndrzejWilkinson, Jeremy JohnWillems, Guido AlexanderBianchi, NicolaWilliams, CrispinWillsher, EmilyWindelband, Bernd StefanWitt, William EdwardXu, RanYalcin, SerpilYamakawa, KoseiYano, SatoshiYin, ZhongbaoYokoyama, HirokiBielcik, JaroslavYoo, In-kwonYoon, Jin HeeYurchenko, VolodymyrZaccolo, ValentinaZaman, AliZampolli, ChiaraCorrea Zanoli, Henrique JoseZardoshti, NimaZarochentsev, AndreyZavada, Petrp-p, p-$\Lambda$ and $\Lambda$-$\Lambda$ correlations studied via femtoscopy in pp reactions at $\sqrt{s}$ = 7 TeVinfo:eu-repo/classification/ddc/530p p: scatteringscattering length: strong interactionhyperon hyperon: interactionresonance: decaycorrelationcorrelation functionCERN LHC CollBrookhaven RHIC Colleffective rangetwo-particlesensitivityphase spacestatisticsbaryonALICEWe report on the first femtoscopic measurement of baryon pairs, such as p-p, p-Λ, and Λ-Λ, measured by ALICE at the Large Hadron Collider (LHC) in proton-proton collisions at s=7TeV. 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-Λ, and Λ-Λ 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 Schrödinger 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 r0=1.125±0.018(stat)−0.035+0.058(syst) fm. The sensitivity of the measured p-Λ 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 Λ-Λ 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.Physical review / C 99(2), 024001 (2019). doi:10.1103/PhysRevC.99.024001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionInst.2019info:eu-repo/semantics/openAccessDEhttps://repository.gsi.de/record/218433https://repository.gsi.de/search?p=id:%22GSI-2019-00411%22Researchersinfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevC.99.024001info:eu-repo/semantics/altIdentifier/issn/2469-9993info:eu-repo/semantics/altIdentifier/wos/WOS:000458815800002info:eu-repo/semantics/altIdentifier/doi/10.15120/GSI-2019-00411info:eu-repo/semantics/altIdentifier/issn/2469-9985info:eu-repo/semantics/altIdentifier/issn/0556-2813info:eu-repo/semantics/altIdentifier/issn/1538-4497info:eu-repo/semantics/altIdentifier/issn/1089-490Xinfo:eu-repo/semantics/altIdentifier/arxiv/arXiv:1805.12455