# The Potential of the ILC for Discovering New Particles

## TL;DR

This paper evaluates the potential of the International Linear Collider (ILC) to discover new particles in various scenarios, emphasizing its complementary role to the LHC in advancing high-energy physics and understanding the universe.

## Contribution

It provides a comprehensive analysis of the ILC's discovery capabilities across different LHC outcomes, highlighting its unique contributions to particle physics.

## Key findings

- ILC can discover new particles not seen at LHC
- ILC complements LHC in exploring low and high mass states
- ILC enhances understanding of fundamental physics

## Abstract

This paper addresses the question of whether the International Linear Collider has the capability of discovering new particles that have not already been discovered at the CERN Large Hadron Collider. We summarize the various paths to discovery offered by the ILC, and discuss them in the context of three different scenarios: 1. LHC does not discover any new particles, 2. LHC discovers some new low mass states and 3. LHC discovers new heavy particles. We will show that in each case, ILC plays a critical role in discovery of new phenomena and in pushing forward the frontiers of high-energy physics as well as our understanding of the universe in a manner which is highly complementary to that of LHC. For the busy reader, a two-page executive summary is provided at the beginning of the document.