Analyses of multi-pion Bose-Einstein correlations for granular sources with coherent pion-emission droplets *Supported by the National Natural Science Foundation of China (11675034, 11275037). (February 2021)

• Record Type: Journal Article
• Authors: Bary, Ghulam; Zhang 张, Wei-Ning 卫宁; Ru 茹, Peng 芃; Yang 杨, Jing 婧
• Is Part Of: Chinese physics C. Volume 45:Number 2(2021)
• Publication Date: 2021-02
• Subjects: pion interferometry -- multi-pion correlations -- viscous granular sources -- partially coherent emission -- relativistic heavy-ion collisions; 25.75.-q -- 25.75.Gz; Particles (Nuclear physics) -- Periodicals; Nuclear physics -- Periodicals; 539.76
• DOI: 10.1088/1674-1137/abcd8d
• Languages: English
• ISSNs: 1674-1137

Abstract

Abstract: The ALICE Collaboration measured three- and four-pion Bose-Einstein correlations (BECs) for Pb-Pb collisions at the Large Hadron Collider (LHC). It is speculated that the observed significant suppression of multi-pion BECs is owing to a considerable degree of coherent pion emission in these collisions. Here, we study multi-pion BEC functions for granular sources with coherent pion-emission droplets. We find that the intercepts of the multi-pion correlation functions at the relative momenta near zero are sensitive to the number of droplets in the granular source. They decrease with the droplet number. The three-pion correlation functions for evolving granular sources with momentum-dependent partially coherent pion-emission droplets basically agree with the experimental data for Pb-Pb collisions at TeV at the LHC. However, the model results for the four-pion correlation function are inconsistent with the experimental data. Investigations into normalized multi-pion correlation functions of granular sources suggest an interesting enhancement of the normalized four-pion correlation function in the moderate relative-momentum region.