# Future High Energy Frontier Colliders

## TL;DR

This paper reviews the current state and future prospects of high-energy colliders, discussing innovative concepts, major challenges, and R&D directions for next-generation facilities beyond the LHC.

## Contribution

It provides a comprehensive overview of proposed future colliders, highlighting their technological challenges and the necessary research and development efforts.

## Key findings

- Identification of key challenges for future colliders
- Overview of innovative collider concepts
- Discussion of R&D priorities for next-generation accelerators

## Abstract

Colliders have been at the forefront of scientic discoveries in high-energy particle physics since the inception of the colliding beams method in the middle of the 20th century. The field of accelerators is very dynamic and many innovative concepts are currently being considered such future facilities as Higgs factories and energy frontier colliders beyond the LHC. Here we briefly overview leading proposals and studies towards the next generation colliders and discuss their major challenges as well as directions of corresponding accelerator R and D programs needed to address their cost and performance risks.