CLIC e+e- Linear Collider Studies

TL;DR

This paper discusses the potential of the CLIC e+e- linear collider to explore fundamental physics at the energy frontier, detailing its design, stages, and expected scientific contributions in complementing the LHC.

Contribution

It presents detailed scenarios for a multi-stage CLIC collider, including design, performance, and physics potential, advancing the technical and scientific planning of future linear colliders.

Findings

Potential for high-precision measurements of Higgs, top, and gauge bosons.

Capability to discover or constrain new physics beyond the Standard Model.

Cost estimates and realistic detector performance simulations provided.

Abstract

This document provides input from the CLIC e+e- linear collider studies to the update process of the European Strategy for Particle Physics. It is submitted on behalf of the CLIC/CTF3 collaboration and the CLIC physics and detector study. It describes the exploration of fundamental questions in particle physics at the energy frontier with a future TeV-scale e+e- linear collider based on the Compact Linear Collider (CLIC) two-beam acceleration technique. A high-luminosity high-energy e+e- collider allows for the exploration of Standard Model physics, such as precise measurements of the Higgs, top and gauge sectors, as well as for a multitude of searches for New Physics, either through direct discovery or indirectly, via high-precision observables. Given the current state of knowledge, following the observation of a \sim125 GeV Higgs-like particle at the LHC, and pending further LHC results at 8 TeV and 14 TeV, a linear e+e- collider built and operated in centre-of-mass energy stages from a few-hundred GeV up to a few TeV will be an ideal physics exploration tool, complementing the LHC. Two example scenarios are presented for a CLIC accelerator built in three main stages of 500 GeV, 1.4 (1.5) TeV, and 3 TeV, together with the layout and performance of the experiments and accompanied by cost estimates. The resulting CLIC physics potential and measurement precisions are illustrated through detector simulations under realistic beam conditions.