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Depolarization and Beam-beam Effects at Future e+e- Colliders

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In order to exploit the full potential of proposed future high-energy electron-positron colliders, precise knowledge of the polarization state of the beams is required. In this paper we present an updated analysis of the depolarization effects caused by the intense beam-beam interaction, which is expected to be the dominant source of depolarization.
The impact of higher-order effects are considered and numerical results from the Guinea-Pig and CAIN simulations are presented for the latest International Linear Collider (ILC) and Compact Linear Collider (CLIC) machine parameters.