Analyses of multi-pion Hanbury Brown–Twiss correlations for the pion-emitting sources with Bose–Einstein condensation. (19th April 2018)

• Record Type: Journal Article
• Authors: Bary, Ghulam; Ru, Peng; Zhang, Wei-Ning
• Is Part Of: Journal of physics. Volume 45:Number 6(2018:Jun.)
• Publication Date: 2018-04-19
• Subjects: multi-pion correlations -- HBT interferometry -- femtoscopy -- Bose–Einstein condensation -- partially coherent source; 25.75.Gz -- 05.30.Jp; Nuclear physics -- Periodicals; Particles (Nuclear physics) -- Periodicals; Physique nucléaire -- Périodiques; Particules (Physique nucléaire) -- Périodiques; Kernfysica; Elementaire deeltjes; 539.7
• DOI: 10.1088/1361-6471/aabb78
• Languages: English
• ISSNs: 0954-3899

Abstract

Abstract: We calculate the three- and four-particle correlations of identical pions in an evolving pion gas (EPG) model with Bose–Einstein condensation. The multi-pion correlation functions in the EPG model are analyzed in different momentum intervals and compared with the experimental data for Pb–Pb collisions at s NN = 2.76 TeV . It is found that the multi-pion correlation functions and cumulant correlation functions are sensitive to the condensation fraction of the EPG sources in the low average transverse-momentum intervals of the three and four pions. The model results of the multi-pion correlations are consistent with the experimental data in a considerable degree, which gives a source condensation fraction between 16% and 47%.