Aug 12 – 18, 2012
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Measurement of dipole flow associated with initial geometry fluctuations in Pb-Pb collisions with the ATLAS detector

Aug 15, 2012, 11:20 AM
Regency 2/3

Regency 2/3


Jiangyong Jia (Brookhaven National Laboratory (BNL)-Unknown-Unknown)


A study of the dipole flow (v_1) associated with initial geometry fluctuations is presented using the 2010 Pb-Pb data. This analysis involves a systematic decomposition of the first order Fourier coefficient of the two-particle correlation into a dipole flow component and a global momentum conservation component. The dipolar flow is extracted as function of pT (0.5-10 GeV), centrality (0-50%) and pseudorapidity (|eta|<2.5). The magnitude of the extracted global momentum conservation component is used to estimate the effective size of the system that conserve momentum as a function of centrality. These results are compared with recent model calculations and their implications on the initial dipole asymmetry are discussed.

Primary author

Zdenek ATLAS Collaboration (Charles University Prague)


Jiangyong Jia (Brookhaven National Laboratory (BNL)-Unknown-Unknown)

Presentation materials

Peer reviewing