Anisotropy scaling functions in heavy-ion collisions: Insights into the ultracentral flow puzzle and constraints on transport coefficients and nuclear deformation
{"title":"Anisotropy scaling functions in heavy-ion collisions: Insights into the ultracentral flow puzzle and constraints on transport coefficients and nuclear deformation","authors":"Roy A. Lacey","doi":"10.1103/physrevc.110.l031901","DOIUrl":null,"url":null,"abstract":"Anisotropy scaling functions derived from comprehensive measurements of transverse momentum- and centrality-dependent anisotropy coefficients <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>v</mi><mn>2</mn></msub><mrow><mo>(</mo><msub><mi>p</mi><mi>T</mi></msub><mo>,</mo><mtext>cent</mtext><mo>)</mo></mrow></mrow></math> and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>v</mi><mn>3</mn></msub><mrow><mo>(</mo><msub><mi>p</mi><mi>T</mi></msub><mo>,</mo><mtext>cent</mtext><mo>)</mo></mrow></mrow></math> in <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Pb</mi><mo>+</mo><mi>Pb</mi></mrow></math> collisions at 5.02 and 2.76 TeV, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Xe</mi><mo>+</mo><mi>Xe</mi></mrow></math> collisions at 5.44 TeV, and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Au</mi><mo>+</mo><mi>Au</mi></mrow></math> collisions at 0.2 TeV offer new insights into the ultracentral flow puzzle. These functions integrate diverse measurements into a single curve, clarifying anisotropy attenuation throughout the entire <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>p</mi><mi>T</mi></msub></math> and centrality range. They reveal the influence of initial-state eccentricities (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>ɛ</mi><mi>n</mi></msub></math>), dimensionless size (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi mathvariant=\"double-struck\">R</mi></math>), radial flow, viscous correction to the thermal distribution function (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>δ</mi><mi>f</mi></msub></math>), the medium's stopping power (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mover accent=\"true\"><mi>q</mi><mo>̂</mo></mover></math>), and specific shear viscosity (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>η</mi><mo>/</mo><mi>s</mi></mrow></math>) on the observed anisotropies. This analysis not only enhances understanding of transport coefficients but also provides crucial constraints on nuclear deformation.","PeriodicalId":20122,"journal":{"name":"Physical Review C","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review C","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevc.110.l031901","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
Anisotropy scaling functions derived from comprehensive measurements of transverse momentum- and centrality-dependent anisotropy coefficients and in collisions at 5.02 and 2.76 TeV, collisions at 5.44 TeV, and collisions at 0.2 TeV offer new insights into the ultracentral flow puzzle. These functions integrate diverse measurements into a single curve, clarifying anisotropy attenuation throughout the entire and centrality range. They reveal the influence of initial-state eccentricities (), dimensionless size (), radial flow, viscous correction to the thermal distribution function (), the medium's stopping power (), and specific shear viscosity () on the observed anisotropies. This analysis not only enhances understanding of transport coefficients but also provides crucial constraints on nuclear deformation.
期刊介绍:
Physical Review C (PRC) is a leading journal in theoretical and experimental nuclear physics, publishing more than two-thirds of the research literature in the field.
PRC covers experimental and theoretical results in all aspects of nuclear physics, including:
Nucleon-nucleon interaction, few-body systems
Nuclear structure
Nuclear reactions
Relativistic nuclear collisions
Hadronic physics and QCD
Electroweak interaction, symmetries
Nuclear astrophysics