TY - JOUR
T1 - Probing the transverse size of initial inhomogeneities with flow observables
AU - Gardim, Fernando G.
AU - Grassi, Frédérique
AU - Ishida, Pedro
AU - Luzum, Matthew
AU - Magalhães, Pablo S.
AU - Noronha-Hostler, Jacquelyn
N1 - Funding Information:
We thank J.-Y. Ollitrault for very helpful discussions on the PCA method. J.N.H acknowledges the use of the Maxwell Cluster and the advanced support from the Center of Advanced Computing and Data Systems at the University of Houston, and the support of the Alfred P. Sloan Foundation. F.G. acknowledges support from Fundac¸ão de Amparo à Pesquisa do Estado de São Paulo (FAPESP grants 2015/00011-8, 2015/50438-8, 2016/03274-2, 2018/00407-7), USP-COFECUB (grant Uc Ph 160-16 (2015/13) ), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq grant 310141/2016-8) and project INCT-FNA Proc. No. 464898/2014-5. F.G.G. was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq grant 312203/2015-2) and FAPEMIG (grant APQ-02107-16). P.I. thanks support from Coordenac¸ão de Aperfeic¸oamento de Pessoal de Nível Superior (CAPES). M.L. acknowledges support from FAPESP projects 2016/24029-6 and 2017/05685-2, and project INCT-FNA Proc. No. 464898/2014-5.
Publisher Copyright:
© 2018
PY - 2019/2
Y1 - 2019/2
N2 - 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.
AB - 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.
KW - Correlations
KW - Initial conditions
KW - Quark gluon plasma
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U2 - 10.1016/j.nuclphysa.2018.10.089
DO - 10.1016/j.nuclphysa.2018.10.089
M3 - Article
AN - SCOPUS:85060150287
SN - 0375-9474
VL - 982
SP - 419
EP - 422
JO - Nuclear Physics, Section A
JF - Nuclear Physics, Section A
ER -