학술논문
Two-pion femtoscopic correlations in Be+Be collisions at $$\sqrt{s_{\text {NN}}} = 16.84$$ s NN = 16.84 GeV measured by the NA61/SHINE at CERN
Document Type
article
Author
H. Adhikary; P. Adrich; K. K. Allison; N. Amin; E. V. Andronov; T. Antićić; I.-C. Arsene; M. Bajda; Y. Balkova; M. Baszczyk; D. Battaglia; A. Bazgir; S. Bhosale; M. Bielewicz; A. Blondel; M. Bogomilov; Y. Bondar; N. Bostan; A. Brandin; W. Bryliński; J. Brzychczyk; M. Buryakov; A. F. Camino; M. Ćirković; M. Csanád; J. Cybowska; T. Czopowicz; C. Dalmazzone; N. Davis; A. Dmitriev; P. von Doetinchem; W. Dominik; P. Dorosz; J. Dumarchez; R. Engel; G. A. Feofilov; L. Fields; Z. Fodor; M. Friend; A. Garibov; M. Gaździcki; O. Golosov; V. Golovatyuk; M. Golubeva; K. Grebieszkow; F. Guber; S. N. Igolkin; S. Ilieva; A. Ivashkin; A. Izvestnyy; K. Kadija; N. Kargin; N. Karpushkin; E. Kashirin; M. Kiełbowicz; V. A. Kireyeu; H. Kitagawa; R. Kolesnikov; D. Kolev; Y. Koshio; V. N. Kovalenko; S. Kowalski; B. Kozłowski; A. Krasnoperov; W. Kucewicz; M. Kuchowicz; M. Kuich; A. Kurepin; A. László; M. Lewicki; G. Lykasov; V. V. Lyubushkin; M. Maćkowiak-Pawłowska; Z. Majka; A. Makhnev; B. Maksiak; A. I. Malakhov; A. Marcinek; A. D. Marino; K. Marton; H.-J. Mathes; T. Matulewicz; V. Matveev; G. L. Melkumov; A. Merzlaya; Ł. Mik; A. Morawiec; S. Morozov; Y. Nagai; T. Nakadaira; M. Naskręt; S. Nishimori; V. Ozvenchuk; O. Panova; V. Paolone; O. Petukhov; I. Pidhurskyi; R. Płaneta; P. Podlaski; B. A. Popov; B. Pórfy; M. Posiadała-Zezula; D. S. Prokhorova; D. Pszczel; S. Puławski; J. Puzović; R. Renfordt; L. Ren; V. Z. Reyna Ortiz; D. Röhrich; E. Rondio; M. Roth; Ł. Rozpłochowski; B. T. Rumberger; M. Rumyantsev; A. Rustamov; M. Rybczynski; A. Rybicki; K. Sakashita; K. Schmidt; A. Yu. Seryakov; P. Seyboth; U. A. Shah; Y. Shiraishi; A. Shukla; M. Słodkowski; P. Staszel; G. Stefanek; J. Stepaniak; M. Strikhanov; H. Ströbele; T. Šuša; Ł. Świderski; J. Szewiński; R. Szukiewicz; A. Taranenko; A. Tefelska; D. Tefelski; V. Tereshchenko; A. Toia; R. Tsenov; L. Turko; T. S. Tveter; M. Unger; M. Urbaniak; F. F. Valiev; D. Veberič; V. V. Vechernin; V. Volkov; A. Wickremasinghe; K. Wójcik; O. Wyszyński; A. Zaitsev; E. D. Zimmerman; A. Zviagina; R. Zwaska; NA61/SHINE Collaboration
Source
European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-15 (2023)
Subject
Language
English
ISSN
1434-6052
Abstract
Abstract This paper reports measurements of two-pion femtoscopic correlations in Be+Be collisions at a beam momentum of 150 $$A\,\hbox {GeV}\!/\!c$$ A GeV / c (energy available in the center-of-mass system for nucleon pair $$\sqrt{s_{\text {NN}}} = 16.84$$ s NN = 16.84 GeV) by the 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 $$\alpha $$ α is approximately constant as a function of $$m_{\text {T}}$$ m T , and far from both the Gaussian case of $$\alpha = 2$$ α = 2 or the conjectured value at the critical endpoint, $$\alpha = 0.5$$ α = 0.5 . The radius scale parameter R shows a slight decrease in $$m_{\text {T}}$$ m T , which can be explained as a signature of transverse flow. Finally, an approximately constant trend of the intercept parameter $$\lambda $$ λ as a function of $$m_{\text {T}}$$ m T was observed, similar to previous NA44 S + Pb results (obtained with a Gaussian approximation, but unlike RHIC results).