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Longitudinal decorrelation measures of flow magnitude and event-plane angles in ultra-relativistic nuclear collisions

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arxiv 1711.03325 v1 pith:KQF3YXSB submitted 2017-11-09 nucl-th hep-phnucl-ex

classification nucl-thhep-phnucl-ex
keywords flowmeasuresmodelcollisionsdecorrelationevent-planefindmagnitude
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We discuss the forward-backward correlations of harmonic flow in Pb+Pb collisions at the CERN Large Hadron Collider (LHC), applying standard multibin measures, as well as proposed here new measures. We illustrate the methods with hydrodynamic model simulations based on event-by-event initial conditions from the wounded quark model with asymmetric rapidity emission profiles. Within the model we examine independently the event-plane angle and the flow magnitude decorrelations. We find specific hierarchy between various flow decorrelation measures and confirm certain factorization relations. We find qualitative agreement of the model and the data from the ATLAS and CMS Collaborations.

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  1. Study of the hottest droplet of fluid through correlations and fluctuations of collective variables

    nucl-th 2025-05 conditional novelty 4.0 of 10

    The thesis uses event-by-event fluctuations and correlations of collective flow and mean transverse momentum to propose new probes of the initial state, explain the ATLAS [pT]-variance fall, and constrain nuclear deformation.

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