Speaker
Description
Methods for measuring the absolute center-of-mass energy using dileptons from e+e- collision events
are further developed with an emphasis on detector and physics limitations.
We discuss three main types of estimator, the lepton momentum-based and angles-based center-of-mass
energy estimators discussed in arXiv:2209.03281, and a new estimator for
the electron and positron collision beam energies. In this work we focus on the
underlying limitations from beam energy spread, detector resolution, and the modeling
of ISR and FSR. We study the consequent implications for the potential of these methods
at center-of-mass energies ranging from 90~GeV to 1~TeV for a number of potential
accelerator realizations in the context of measurements of masses of the Z, W, H, top quark,
and new particles.
