Probing the transverse size of initial inhomogeneities with flow observables

Fernando G. Gardim, Frédérique Grassi, Pedro Ishida, Matthew Luzum, Pablo S. Magalhães, Jacquelyn Noronha-Hostler

Research output: Contribution to journalArticlepeer-review


Disentangling the effect of initial conditions and medium properties is an open question in the field of relativistic heavy-ion collisions. We argue that, while one can study the impact of initial inhomogeneities by varying their size, it is important to maintain the global properties fixed. We present a method to do this. We show that many observables are insensitive to the the hot spot sizes, including integrated vn, scaled distributions of vn, symmetric cumulants, event-plane correlations, and differential vn(pT). We find however that the factorization breaking ratio rn and sub-leading component in a Principal Component Analysis are more sensitive to the initial granularity and can be used to probe short-scale features of the initial density.

Original languageEnglish (US)
Pages (from-to)419-422
Number of pages4
JournalNuclear Physics A
StatePublished - Feb 2019
Externally publishedYes


  • Correlations
  • Initial conditions
  • Quark gluon plasma

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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