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Azimuthal dependence of two-particle transverse momentum current correlations
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- Magdy, Niseem (author)
- University of Illinois at Chicago
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- Basu, Sumit (author)
- Lund University,Lunds universitet,Partikel- och kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Particle and nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Gonzalez, Victor (author)
- Wayne State University
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- (creator_code:org_t)
- 2021-08-30
- 2021
- English.
- In: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 81:8
- Journal article (peer-reviewed)
Abstract
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- Two-particle transverse momentum correlation functions are a powerful technique for understanding the dynamics of relativistic heavy-ion collisions. Among these, the transverse momentum correlator G2(Δη, Δφ) is of particular interest for its potential sensitivity to the shear viscosity per unit of entropy density η/ s of the quark-gluon plasma formed in heavy-ion collisions. We use the UrQMD, AMPT, and EPOS models for Au–Au at sNN = 200 GeV and Pb–Pb at sNN = 2760 GeV to investigate the long range azimuthal dependence of G2(Δη, Δφ) , and explore its utility to constrain η/ s based on charged particle correlations. We find that the three models yield quantitatively distinct transverse momentum Fourier harmonics coefficients anpT. We also observe these coefficients exhibit a significant dependence on η/ s in the context of the AMPT model. These observations suggest that exhaustive measurements of the dependence of G2(Δφ) with collision energy, system size, collision centrality, in particular, offer the potential to distinguish between different theoretical models and their underlying assumptions. Exhaustive analyses of G2(Δφ) obtained in large and small systems should also be instrumental in establishing new constraints for precise extraction of η/ s.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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- art (subject category)
- ref (subject category)
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- Magdy, Niseem
- Basu, Sumit
- Gonzalez, Victor
- Marin, Ana
- Evdokimov, Olga
- Lacey, Roy A.
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- Pruneau, Claude
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- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Lund University
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