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A remark on the sign change of the four-particle azimuthal cumulant in small systems
Published 4 Jan 2018 in hep-ph, hep-ex, nucl-ex, and nucl-th | (1801.01277v2)
Abstract: The azimuthal cumulants, $c_2{2}$ and $c_2{4}$, originating from the global conservation of transverse momentum in the presence of hydro-like elliptic flow are calculated. We observe the sign change of $c_2{4}$ for small number of produced particles. This is in a qualitative agreement with the recent ATLAS measurement of multi-particle azimuthal correlations with the subevent cumulant method.
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