The FCC-ee design study: luminosity and beam polarization

TL;DR

This paper discusses the design study of the FCC-ee, a high luminosity electron-positron collider aimed at multiple energy regimes, highlighting its current status, promising concepts, challenges, and polarization studies.

Contribution

It provides an update on the FCC-ee design, including luminosity performance and beam polarization studies, advancing the development of a potential precursor to a 100 TeV hadron collider.

Findings

Expected luminosity performance across energies

Feasibility of transverse polarization for energy calibration

Identification of key design challenges

Abstract

The FCC-ee accelerator is considered within the FCC design study as a possible first step towards the ultimate goal of a 100 TeV hadron collider. It is a high luminosity e+e- storage ring collider, designed to cover energies of around 90, 160, 240 and 350GeV ECM (for the Z peak, the WW threshold, the ZH and ttbar cross-section maxima respectively) leading to different operating modes. We report on the current status of the design study, on the most promising concepts and relevant challenges. The expected luminosity performance at all energies, and first studies on transverse polarization for beam energy calibrations will be presented.