Two-pion femtoscopic correlations in Be+Be collisions at √sNN = 16.84 GeV measured by the NA61/SHINE at CERN

(NA61/SHINE Collaboration) Adhikary, H; Adrich, P; Allison, KK; Amin, N; Andronov, EV; Anticic, T; Arsene, IC; Bajda, M; Balkova, Y; Baszczyk, M; Battaglia, D; Bazgir, A; Bhosale, S; Bielewicz, M; Blondel, A; Bogomilov, M; Bondar, Y; Bostan, N; Brandin, A; Brylinski, W; Brzychczyk, J; Buryakov, M; Camino, AF; Cirkovic, M; Csanád, M; Cybowska, J; Czopowicz, T; Dalmazzone, C; Davis, N; Dmitriev, A; von Doetinchem, P; Dominik, W; Dorosz, P; Dumarchez, J; Engel, R; Feofilov, GA; Fields, L; Fodor, Z; Friend, M; Garibov, A; Gazdzicki, M; Golosov, O; Golovatyuk, V; Golubeva, M; Grebieszkow, K; Guber, F; Igolkin, SN; Ilieva, S; Ivashkin, A; Izvestnyy, A; Kadija, K; Kargin, N; Karpushkin, N; Kashirin, E; Kielbowicz, M; Kireyeu, VA; Kitagawa, H; Kolesnikov, R; Kolev, D; Koshio, Y; Kovalenko, VN; Kowalski, S; Kozlowski, B; Krasnoperov, A; Kucewicz, W; Kuchowicz, M; Kuich, M; Kurepin, A; László, A; Lewicki, M; Lykasov, G; Lyubushkin, VV; Mackowiak-Pawlowska, M; Majka, Z; Makhnev, A; Maksiak, B; Malakhov, AI; Marcinek, A; Marino, AD; Marton, K; Mathes, HJ; Matulewicz, T; Matveev, V; Melkumov, GL; Merzlaya, A; Mik, L; Morawiec, A; Morozov, S; Nagai, Y; Nakadaira, T; Naskret, M; Nishimori, S; Ozvenchuk, V; Panova, O; Paolone, V; Petukhov, O; Pidhurskyi, I; Planeta, R; Podlaski, P; Popov, BA; Pórfy, B; Posiadala-Zezula, M; Prokhorova, DS; Pszczel, D; Pulawski, S; Puzovic, J; Renfordt, R; Ren, L; Ortiz, VZR; Röhrich, D; Rondio, E; Roth, M; Rozplochowski, L; Rumberger, BT; Rumyantsev, M; Rustamov, A; Rybczynski, M; Rybicki, A; Sakashita, K; Schmidt, K; Seryakov, AY; Seyboth, P; Shah, UA; Shiraishi, Y; Shukla, A; Slodkowski, M; Staszel, P; Stefanek, G; Stepaniak, J; Strikhanov, M; Ströbele, H; Susa, T; Swiderski, L; Szewinski, J; Szukiewicz, R; Taranenko, A; Tefelska, A; Tefelski, D; Tereshchenko, V; Toia, A; Tsenov, R; Turko, L; Tveter, TS; Unger, M; Urbaniak, M; Valiev, FF; Veberic, D; Vechernin, VV; Volkov, V; Wickremasinghe, A; Wójcik, K; Wyszynski, O; Zaitsev, A; Zimmerman, ED; Zviagina, A; Zwaska, R. (2023) Two-pion femtoscopic correlations in Be+Be collisions at √sNN = 16.84 GeV measured by the NA61/SHINE at CERN. The European Physical Journal C, 83 . ISSN 1434-6044

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Abstract

This paper reports measurements of two-pion femtoscopic correlations in Be+Be collisions at a beam momentum of 150A GeV/c (energy available in the centerof-mass system for nucleon pair √sNN = 16.84 GeV) by theNA61/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 mT , 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 mT , which can be explained as a signature of transverse flow. Finally, an approximately constant trend of the intercept parameter λ as a function of mT was observed, similar to previous NA44 S + Pb results (obtained with a Gaussian approximation, but unlike RHIC results).

Item Type:	Article
Uncontrolled Keywords:	CERN; SPS; NA61/SHINE; Be+Be; correlations
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Centre for detectors, sensors and electronics Division of Experimental Physics
Depositing User:	Ivana Vuglec
Date Deposited:	30 Apr 2026 10:40
URI:	https://fulir.irb.hr:/id/eprint/11848
DOI:	10.1140/epjc/s10052-023-11997-8

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