Two-pion femtoscopic correlations in Be+Be collisions at $\sqrt{s_{\textrm{NN}}} = 16.84$ GeV measured by the NA61/SHINE at CERN
Creators: name: SHINE Collaboration
name: Adhikary, H.
name: Adrich, P.
name: Allison, K. K.
name: Amin, N.
name: Andronov, E. V.
name: Antićić, T.
name: Arsene, I. -C.
name: Bajda, M.
name: Balkova, Y.
name: Baszczyk, M.
name: Battaglia, D.
name: Bazgir, A.
name: Bhosale, S.
name: Bielewicz, M.
name: Blondel, A.
name: Bogomilov, M.
name: Bondar, Y.
name: Bostan, N.
name: Brandin, A.
name: Bryliński, W.
name: Brzychczyk, J.
name: Buryakov, M.
name: Camino, A. F.
name: Ćirković, M.
name: Csanád, M.
name: Cybowska, J.
name: Czopowicz, T.
name: Dalmazzone, C.
name: Davis, N.
name: Dmitriev, A.
name: von Doetinchem, P.
name: Dominik, W.
name: Dorosz, P.
name: Dumarchez, J.
name: Engel, R.
name: Feofilov, G. A.
name: Fields, L.
name: Fodor, Z.
name: Friend, M.
name: Garibov, A.
name: Gaździcki, M.
name: Golosov, O.
name: Golovatyuk, V.
name: Golubeva, M.
name: Grebieszkow, K.
name: Guber, F.
name: Igolkin, S. N.
name: Ilieva, S.
name: Ivashkin, A.
name: Izvestnyy, A.
name: Kadija, K.
name: Kargin, N.
name: Karpushkin, N.
name: Kashirin, E.
name: Kiełbowicz, M.
name: Kireyeu, V. A.
name: Kitagawa, H.
name: Kolesnikov, R.
name: Kolev, D.
name: Koshio, Y.
name: Kovalenko, V. N.
name: Kowalski, S.
name: Kozłowski, B.
name: Krasnoperov, A.
name: Kucewicz, W.
name: Kuchowicz, M.
name: Kuich, M.
name: Kurepin, A.
name: László, A.
name: Lewicki, M.
name: Lykasov, G.
name: Lyubushkin, V. V.
name: Maćkowiak-Pawłowska, M.
name: Majka, Z.
name: Makhnev, A.
name: Maksiak, B.
name: Malakhov, A. I.
name: Marcinek, A.
name: Marino, A. D.
name: Marton, K.
name: Mathes, H. -J.
name: Matulewicz, T.
name: Matveev, V.
name: Melkumov, G. L.
name: Merzlaya, A.
name: Mik, Ł.
name: Morawiec, A.
name: Morozov, S.
name: Nagai, Y.
name: Nakadaira, T.
name: Naskręt, M.
name: Nishimori, S.
name: Ozvenchuk, V.
name: Panova, O.
name: Paolone, V.
name: Petukhov, O.
name: Pidhurskyi, I.
name: Płaneta, R.
name: Podlaski, P.
name: Popov, B. A.
name: Pórfy, B.
name: Posiadała-Zezula, M.
name: Prokhorova, D. S.
name: Pszczel, D.
name: Puławski, S.
name: Puzović, J.
name: Renfordt, R.
name: Ren, L.
name: Ortiz, V. Z. Reyna
name: Röhrich, D.
name: Rondio, E.
name: Roth, M.
name: Rozpłochowski, Ł.
name: Rumberger, B. T.
name: Rumyantsev, M.
name: Rustamov, A.
name: Rybczynski, M.
name: Rybicki, A.
name: Sakashita, K.
name: Schmidt, K.
name: Seryakov, A. Yu.
name: Seyboth, P.
name: Shah, U. A.
name: Shiraishi, Y.
name: Shukla, A.
name: Słodkowski, M.
name: Staszel, P.
name: Stefanek, G.
name: Stepaniak, J.
name: Strikhanov, M.
name: Ströbele, H.
name: Šuša, T.
name: Świderski, Ł.
name: Szewiński, J.
name: Szukiewicz, R.
name: Taranenko, A.
name: Tefelska, A.
name: Tefelski, D.
name: Tereshchenko, V.
name: Toia, A.
name: Tsenov, R.
name: Turko, L.
name: Tveter, T. S.
name: Unger, M.
name: Urbaniak, M.
name: Valiev, F. F.
name: Veberič, D.
name: Vechernin, V. V.
name: Volkov, V.
name: Wickremasinghe, A.
name: Wójcik, K.
name: Wyszyński, O.
name: Zaitsev, A.
name: Zimmerman, E. D.
name: Zviagina, A.
name: Zwaska, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: This paper reports measurements of two-pion Bose-Einstein (HBT) correlations in Be+Be collisions at a beam momentum of 150$A\,\mbox{GeV}/\textit{c}$ by the $\mbox{NA61/SHINE}$ experiment at the CERN SPS accelerator. The obtained momentum space correlation functions can be well described by a Lévy distributed source model. The transverse mass dependence of the Lévy source parameters is presented, and their possible theoretical interpretations are discussed. The results show that the Lévy exponent $α$ is approximately constant as a function of $m_{\rm{T}}$ , and far from both the Gaussian case of $α= 2$ or the conjectured value at the critical endpoint, $α= 0.5$. The radius scale parameter $R$ shows a slight decrease in $m_{\rm{T}}$, which can be explained as a signature of transverse flow. Finally, an approximately constant trend of the intercept parameter $λ$ as a function of $m_{\rm{T}}$ was observed, different from measurement results at RHIC.