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Epple, E. Krebs, E.T. Atomssa, F. Guber, G. Agakishiev, G. Korcyl, G. Kornakov, H. Kuc, H. Schuldes, H. Str\\\"obele, H. Tsertos, I. Fr\\\"ohlich, I. Koenig, J. Adamczewski-Musch, J. A. Garzon, J. Biernat, J.C. Berger-Chen, J. Friese, J. Markert, J. Michel C. M\\\"untz, J. Pietraszko, J. Siebenson, J. Stroth, J. Wirth, J. W\\\"ustenfeld, K. Gill, K. Lapidus, K. Schmidt-Sommerfeld, K. Teilab, L. Fabbietti, L. Lopes, L. Maier, L. Naumann, L. Rehnisch, L. Silva, M. B\\\"ohmer, M. Golubeva, M. Gumberidze, M. Jurkovic, M. Lorenz, M. Palka, M. Traxler, O. Arnold, O. Fateev, O. Pechenova, O. Svoboda, P. Bordalo, P. Fonte, P. Kurilkin, P. Salabura, P. Sellheim, P. Strzempek, P. Tlusty, P. Zumbruch, R. Holzmann, R. Kotte, R. Lalik, R. M\\\"unzer, S. Chernenko, S. Harabasz, S. Hlavac, S. Maurus, S. Spataro, T. Galatyuk, T. Hennino, T. Karavicheva, T. Kunz, T. Mahmoud, T. Scheib, T. Vasiliev, V. Ladygin, V. Metag, V. Pechenov, V. Petousis, V. Wagner, W. Koenig, W. Przygoda, Y. Parpottas, Yu.G. Sobolev, Y. Zanevsky","submitted_at":"2016-02-29T09:35:01Z","abstract_excerpt":"We report on the first measurement of $p\\Lambda$ and $pp$ correlations via the femtoscopy method in p+Nb reactions at $\\mathrm{\\sqrt{s_{NN}}=3.18} ~\\mathrm{GeV}$, studied with the High Acceptance Di-Electron Spectrometer (HADES). By comparing the experimental correlation function to model calculations, a source size for $pp$ pairs of $r_{0,pp}=2.02 \\pm 0.01(\\mathrm{stat})^{+0.11}_{-0.12} (\\mathrm{sys}) ~\\mathrm{fm}$ and a slightly smaller value for $p\\Lambda$ of $r_{0,\\Lambda p}=1.62 \\pm 0.02(\\mathrm{stat})^{+0.19}_{-0.08}(\\mathrm{sys}) ~\\mathrm{fm}$ is extracted. 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