Higgs Working Group Report of the Snowmass 2013 Community Planning Study

TL;DR

This report reviews the potential of future colliders to perform precision Higgs physics measurements, exploring Higgs properties, couplings, and searches for new physics beyond the Standard Model.

Contribution

It provides a comprehensive assessment of the physics capabilities of upcoming experimental facilities for Higgs studies as discussed during the Snowmass 2013 community planning process.

Findings

Projected measurement precisions for Higgs couplings at future colliders

Potential to discover additional Higgs bosons in extended models

Feasibility of probing Higgs self-coupling and quantum numbers

Abstract

This report summarizes the work of the Energy Frontier Higgs Boson working group of the 2013 Community Summer Study (Snowmass). We identify the key elements of a precision Higgs physics program and document the physics potential of future experimental facilities as elucidated during the Snowmass study. We study Higgs couplings to gauge boson and fermion pairs, double Higgs production for the Higgs self-coupling, its quantum numbers and $CP$-mixing in Higgs couplings, the Higgs mass and total width, and prospects for direct searches for additional Higgs bosons in extensions of the Standard Model. Our report includes projections of measurement capabilities from detailed studies of the Compact Linear Collider (CLIC), a Gamma-Gamma Collider, the International Linear Collider (ILC), the Large Hadron Collider High-Luminosity Upgrade (HL-LHC), Very Large Hadron Colliders up to 100 TeV (VLHC), a Muon Collider, and a Triple-Large Electron Positron Collider (TLEP).