Rapidity-dependent eccentricity scaling in relativistic heavy-ion collisions

Author(s)

Franco, Rodrigo ; Luzum, Matthew

• Document type: Journal article
• Source: Physics Letters B; v. 806, p. 6-pg., 2020-07-10.

Abstract

There is a well-established relation between the spatial asymmetry in the initial stage of a heavy-ion collision and the final momentum anisotropy, which allows for a separation of effects from initial conditions vs. later evolution and has proved exceptionally powerful. However, until recently it has only been studied in two dimensions - either through boost-invariant simulations or studying only quantities at mid-rapidity. We explore an extension to 3 dimensions, in order to determine whether a similar understanding can be obtained for the rapidity dependence of the collision system. In particular, we introduce rapidity-dependent eccentricities and investigate a trivial extension of the 2D eccentricity scaling of elliptic and triangular flow, as well as a way to systematically improve these initial-state estimators. We then explore the dependence of the resulting new response coefficients on shear viscosity and initial total energy. (C) 2020 The Authors. Published by Elsevier B.V. (AU)

• FAPESP's process: 19/04318-1 - Developing a new Monte Carlo model for heavy-ion collisions
• Grantee: Rodrigo Guanciale Franco
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 16/24029-6 - Investigating the strong nuclear interactions under extreme conditions
• Grantee: Matthew William Luzum
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 18/24720-6 - Exploring the QCD phase diagram
• Grantee: Frédérique Marie Brigitte Sylvie Grassi
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/05685-2 - Hadronic physics in high energy nuclear collisions
• Grantee: Jun Takahashi
• Support Opportunities: Special Projects