17 Gonzalez, Victor Basu, Sumit Marin, Ana Pan, Jinjin Ladron de Guevara, Pedro Pruneau, Claude A. ALI The European physical journal / C The European physical journal / C Springer Heidelberg 1434-6052 10.1140/epjc/s10052-021-09260-z English 465 5 81 The specific shear viscosity, 𝜂/𝑠, of the quark-gluon plasma formed in ultrarelativistic heavy-ion collisions at RHIC and LHC is estimated based on the progressive longitudinal broadening of transverse momentum two-particle correlators, 𝐺$_2$, reported as a function of collision centrality by the STAR and ALICE experiments. Estimates are computed as a function of collision centrality using the Gavin ansatz which relates the 𝐺$_2$ longitudinal broadening to the specific shear viscosity. Freeze out times required for the use of the ansatz are computed using a linear fit of freeze out times reported as a function of the cubic root of the charged particle pseudorapidity density (d𝑁ch/d𝜂)$^{1/3}$. Estimates of 𝜂/𝑠 based on ALICE data exhibit little to no dependence on collision centrality at LHC energy, while estimates obtained from STAR data hint that 𝜂/𝑠 might be a function of collision centrality at top RHIC energy. This article is licensed under a Creative Commons Attribution4.0 International License. Funded by SCOAP3. ; PUB:(DE-HGF)16, ; 0, ; WOS:000680444300003 Journal Article 2021 GSI-2022-00072 2021 https://repository.gsi.de/record/245744 https://doi.org/10.1140/epjc/s10052-021-09260-z <Go to ISI>://WOS:000680444300003