Physics at Future Colliders: the Interplay Between Energy and Luminosity

Abstract

In this note, as an input to the Snowmass studies, we provide a broad-brush picture of the physics output of future colliders as a function of their center of mass energies and luminosities. Instead of relying on precise projections of physics reaches, which are lacking in many cases, we mainly focused on simple benchmarks of physics yields, such as the number of Higgs boson produced. More detailed considerations for lepton colliders are given since there have been various recent proposals. A brief summary for hadron colliders based on a simple scaling estimate of the physics reaches is also included.

Understanding PDF uncertainty on the $W$ boson mass measurements in CT18 global analysis

“…This new measurement triggers a lot of discussions concerning possible new physics effects (see Refs. as examples), Standard Model Effective Theory (SMEFT) implications [90][91][92][93], as well as evaluations of various theoretical uncertainties [94][95][96][97][98]. Previously, there are also direct measurements at the LHC 7 TeV from the ATLAS collaboration with M W = 80, 370 ± 7 stat ± 18 syst MeV [99], at the LHC 13 TeV from the LHCb collaboration with M W = 80, 354 ± 23 stat ± 22 syst MeV [100], and ealier from Tevatron [101] and LEP [102].…”