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Jun 24 – 28, 2019
US/Eastern timezone
5th International Conference on the Initial Stages in High-Energy Nuclear Collisions

Measurement of elliptic and triangular flow with multiparticle correlations in pPb collisions at 8.16 TeV

Jun 26, 2019, 4:30 PM
301 (Pupin)



Oral Collectivity in small systems Parallel: Collectivity in small systems 2


Shengquan Tuo (Vanderbilt University (US))


The second- and third-order azimuthal anisotropy Fourier harmonics are studied in pPb collisions at $\sqrt{s_{_\text{NN}}}=8.16~\mathrm{TeV}$ over a wide range of event multiplicities. Multiparticle correlations are used to isolate global properties stemming from the collision overlap geometry. The second-order, elliptic'' harmonic moment is obtained with high precision through four-, six-, and eight-particle correlations and, for the first time, the third-order,triangular'' harmonic moment is studied using four-particle correlations. A sample of peripheral PbPb collisions at $\sqrt{s_{_{\text{NN}}}}=5.02~\mathrm{TeV}$ that covers a similar range of event multiplicities to the pPb results is also analyzed. Model calculations of initial-state fluctuations in pPb and PbPb collisions can be directly compared to the high precision experimental results. This work provides new insight on the fluctuation-driven geometry at the earliest stages of heavy ion collisions.

Primary author

Sergey Petrushanko (Moscow State University)

Presentation materials