Physics Opportunities with Polarized e- and e+ Beams at TESLA

TL;DR

Polarizing both electron and positron beams at TESLA enhances the precision and scope of physics analyses, offering significant advantages over electron-only polarization in studying Higgs, electroweak, QCD, SUSY, and alternative theories.

Contribution

This paper highlights the benefits of simultaneous polarization of both beams and summarizes related results from key physics working groups for a future linear collider.

Findings

Polarizing both beams improves analysis precision.

Simultaneous polarization provides additional information.

Enhanced sensitivity to new physics scenarios.

Abstract

Beam polarization at e+ e- linear colliders will be a powerful tool for high precision analyses. Often it is assumed that the full information from polarization effects is provided by polarization of the electron beam and no further information can be obtained by the simultaneous polarization of the positrons. In this paper we point out the advantages of polarizing both beams, and summarize the polarization-related results of the Higgs, Electroweak, QCD, SUSY and Alternative Theories working groups of the ECFA/DESY workshop for a planned linear collider operating in the energy range sqrt{s}= 500-800 GeV.