Publication: Long-range collectivity in small collision systems with two- and four-particle correlations at STAR
Дата
2019
Авторы
Huang, S. L.
Adam, J.
Adamczyk, L.
Adams, J. R.
Alekseev, I.
Brandin, A. V.
Kochenda, L.
Kravtsov, P.
Nigmatkulov, G.
Okorokov, V. A.
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Аннотация
New STAR measurements of two- and four-particle (c(2){4}) azimuthal angle correlations are reported for p+Au collisions at 200 GeV and d+Au collisions from 19.6 to 200 GeV. A negative c(2){4), consistent with collective anisotropic flow, is observed in high multiplicity d+Au events at 62.4 and 200 GeV where the statistical significance of the data allows an analysis. A template fitting method, employed to subtract non-flow contributions to the two-particle correlations, allows the extraction of the anisotropy coefficients (v(2)) for these systems at their respective energies. The v(2) results for different energies show a common dependence on the charged particle multiplicity density << dN(ch)/d eta >>, which provide important insight on the nature of collective behavior in small collision systems.
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Long-range collectivity in small collision systems with two- and four-particle correlations at STAR / Huang, SL [et al.] // NUCLEAR PHYSICS A. - 2019. - 982. - P. 475-478. - 10.1016/j.nuclphysa.2018.09.072