Initial Stages 2019

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

26 Jun 2019, 16:30

20m

301 (Pupin)

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

Speaker

Shengquan Tuo (Vanderbilt University (US))

Description

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.

Presentation materials

is2019_tuo.pdf