Lévy-stable two-pion Bose-Einstein correlations in √.sup.s./sup.NN=200 GeV Au+Au collisions

0501758 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Adare, A. - Aidala, C. - Ajitanand, N.N. - Tomášek, Lukáš - Tomášek, Michal - Vrba, Václav … celkem 454 autorů
Lévy-stable two-pion Bose-Einstein correlations in √^sNN=200 GeV Au+Au collisions.
Physical Review C. Roč. 97, č. 6 (2018), s. 1-22, č. článku 064911. ISSN 2469-9985. E-ISSN 2469-9993
Institucionální podpora: RVO:68378271
Klíčová slova: correlation: Bose-Einstein * critical phenomena: quark hadron * mass: transverse * stability * transverse momentum * hydrodynamics * heavy ion
Obor OECD: Particles and field physics
Impakt faktor: 3.132, rok: 2018

We present a detailed measurement of charged two-pion correlation functions in 0–30% centrality sNN=200 GeV Au+Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose-Einstein correlation functions stemming from Lévy-stable source distributions. Using a fine transverse momentum binning, we extract the correlation strength parameter λ, the Lévy index of stability α, and the Lévy length scale parameter R as a function of average transverse mass of the pair mT. We find that the positively and the negatively charged pion pairs yield consistent results, and their correlation functions are represented, within uncertainties, by the same Lévy-stable source functions. The λ(mT) measurements indicate a decrease of the strength of the correlations at low mT.
Trvalý link: http://hdl.handle.net/11104/0293754