In the EPOS4 framework, a symmetric initial parton distribution cannot reproduce the flat elliptic flow versus multiplicity seen in high-multiplicity pp collisions, whereas a two-center 'dipole' proton shape can.
Flow analysis from cumulants: a practical guide
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abstract
We have recently proposed a new method of flow analysis, based on a cumulant expansion of multiparticle azimuthal correlations. Here, we describe the practical implementation of the method. The major improvement over traditional methods is that the cumulant expansion eliminates order by order correlations not due to flow, which are often large but usually neglected.
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Flow in small systems in the EPOS4 approach for high-energy scatterings
In the EPOS4 framework, a symmetric initial parton distribution cannot reproduce the flat elliptic flow versus multiplicity seen in high-multiplicity pp collisions, whereas a two-center 'dipole' proton shape can.