학술논문
Measurements of two-pion HBT correlations in Be+Be collisions at 150A GeV/c beam momentum, at the NA61/SHINE experiment at CERN
Document Type
Working Paper
Author
Collaboration, NA61/SHINE; Adhikary, H.; Adrich, P.; Allison, K. K.; Amin, N.; Andronov, E. V.; Antićić, T.; Arsene, I. -C.; Bajda, M.; Balkova, Y.; Baszczyk, M.; Battaglia, D.; Bazgir, A.; Bhosale, S.; Bielewicz, M.; Blondel, A.; Bogomilov, M.; Bondar, Y.; Bostan, N.; Brandin, A.; Bryliński, W.; Brzychczyk, J.; Buryakov, M.; Camino, A. F.; Ćirković, 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, G. A.; Fields, L.; Fodor, Z.; Friend, M.; Garibov, A.; Gaździcki, M.; Golosov, O.; Golovatyuk, V.; Golubeva, M.; Grebieszkow, K.; Guber, F.; Igolkin, S. N.; Ilieva, S.; Ivashkin, A.; Izvestnyy, A.; Kadija, K.; Kargin, N.; Karpushkin, N.; Kashirin, E.; Kiełbowicz, M.; Kireyeu, V. A.; Kitagawa, H.; Kolesnikov, R.; Kolev, D.; Koshio, Y.; Kovalenko, V. N.; Kowalski, S.; Kozłowski, B.; Krasnoperov, A.; Kucewicz, W.; Kuchowicz, M.; Kuich, M.; Kurepin, A.; László, A.; Lewicki, M.; Lykasov, G.; Lyubushkin, V. V.; Maćkowiak-Pawłowska, M.; Majka, Z.; Makhnev, A.; Maksiak, B.; Malakhov, A. I.; Marcinek, A.; Marino, A. D.; Marton, K.; Mathes, H. -J.; Matulewicz, T.; Matveev, V.; Melkumov, G. L.; Merzlaya, A.; Mik, Ł.; Morawiec, A.; Morozov, S.; Nagai, Y.; Nakadaira, T.; Naskręt, M.; Nishimori, S.; Ozvenchuk, V.; Panova, O.; Paolone, V.; Petukhov, O.; Pidhurskyi, I.; Płaneta, R.; Podlaski, P.; Popov, B. A.; Pórfy, B.; Posiadała-Zezula, M.; Prokhorova, D. S.; Pszczel, D.; Puławski, S.; Puzović, J.; Renfordt, R.; Ren, L.; Ortiz, V. Z. Reyna; Röhrich, D.; Rondio, E.; Roth, M.; Rozpłochowski, Ł.; Rumberger, B. T.; Rumyantsev, M.; Rustamov, A.; Rybczynski, M.; Rybicki, A.; Sakashita, K.; Schmidt, K.; Seryakov, A. Yu.; Seyboth, P.; Shah, U. A.; Shiraishi, Y.; Shukla, A.; Słodkowski, M.; Staszel, P.; Stefanek, G.; Stepaniak, J.; Strikhanov, M.; Ströbele, H.; Šuša, T.; Świderski, Ł.; Szewiński, J.; Szukiewicz, R.; Taranenko, A.; Tefelska, A.; Tefelski, D.; Tereshchenko, V.; Toia, A.; Tsenov, R.; Turko, L.; Tveter, T. S.; Unger, M.; Urbaniak, M.; Valiev, F. F.; Veberič, D.; Vechernin, V. V.; Volkov, V.; Wickremasinghe, A.; Wójcik, K.; Wyszyński, O.; Zaitsev, A.; Zimmerman, E. D.; Zviagina, A.; Zwaska, R.
Source
Eur.Phys.J.C 83 (2023) 10, 919
Subject
Language
Abstract
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 L\'evy distributed source model. The transverse mass dependence of the L\'evy source parameters is presented, and their possible theoretical interpretations are discussed. The results show that the L\'evy exponent $\alpha$ is approximately constant as a function of $m_{\rm{T}}$ , and far from both the Gaussian case of $\alpha = 2$ or the conjectured value at the critical endpoint, $\alpha = 0.5$. 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 $\lambda$ as a function of $m_{\rm{T}}$ was observed, different from measurement results at RHIC.