Momentum-dependent flow fluctuations as a hydrodynamic response to initial geometry

Author(s)

Hippert, M. ; Chinellato, D. D. ; Luzum, M. ; Noronha, J. ; Nunes da Silva, T. ; Takahashi, J.

• Document type: Journal article
• Source: Nuclear Physics A; v. 1005, p. 4-pg., 2021-01-01.

Abstract

We propose a redefinition of the principal component analysis (PCA) of anisotropic flow that makes it more directly connected to fluctuations of the initial geometry of the system. Then, using state-of-the-art hydrodynamic simulations, we make an explicit connection between flow fluctuations and a cumulant expansion of the initial transverse geometry. In particular, we show that the second principal component of elliptic flow is generated by higher-order cumulants, and therefore probes smaller length scales of the initial state. With this information, it will be possible to put new constraints on properties of the early-time dynamics of a heavy-ion collision, including small-scale structure, as well as properties of the quark-gluon plasma. (AU)

• FAPESP's process: 16/13803-2 - Strangeness production in Pb-Pb collisions at 5.02TeV in ALICE
• Grantee: David Dobrigkeit Chinellato
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/01245-0 - Characterization of the QGP through the hydrodynamic evolution
• Grantee: Tiago Jose Nunes da Silva
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/07833-1 - Hydrodynamical behavior of the QGP near the critical point
• Grantee: Maurício Hippert Teixeira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• 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: 17/05685-2 - Hadronic physics in high energy nuclear collisions
• Grantee: Jun Takahashi
• Support Opportunities: Special Projects