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Non-Gaussian elliptic-flow fluctuations in PbPb collisions at √sNN=5.02 TeVстатья
- Авторы: Nazarova E., CMS Collaboration
- Журнал: arXiv: nucl-ex
- Номер: 1711.05594v1
- Год издания: 2017
- Первая страница: 1
- Последняя страница: 32
- Аннотация: Event-by-event fluctuations in the elliptic-flow coefficient v2 are studied in PbPb collisions at √sNN=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2) for charged particles with transverse momentum 0.3<pT<3.0 GeV and pseudorapidity |η|< 1.0 are determined for different collision centrality classes. The moments of the p(v2) distributions are used to calculate the v2 coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v2) distributions indicate non-Gaussian initial-state fluctuation behavior. Bessel-Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.
- Добавил в систему: Назарова Елизавета Николаевна