Particle Physics at Accelerators in the United States and Asia

TL;DR

This paper reviews the current and future particle physics accelerator projects in the United States and Asia, emphasizing their role in advancing understanding of fundamental particles and interactions, especially post-Higgs discovery.

Contribution

It provides a comprehensive overview of regional accelerator initiatives and advocates for global collaboration to optimize particle physics research infrastructure.

Findings

Development of next-generation colliders in Japan and China

Construction of neutrino mega-facilities in the US and Japan

Complementarity of US and Asian programs with European strategies

Abstract

Particle physics experiments in the United States and Asia have greatly contributed to the understanding of elementary particles and their interactions. With the recent discovery of the Higgs boson at CERN, interest in the development of next-generation colliders has been rekindled. A linear electron-positron collider in Japan and a circular collider in China have been proposed for precision studies of the Higgs boson. In addition to the Higgs programme, new accelerator-based long-baseline neutrino mega-facilities are being built in the United States and Japan. Here, we outline the present status of key particle physics programmes at accelerators and future plans in the United States and Asia that largely complement approaches being explored in the European Strategy for Particle Physics Update. We encourage the pursuit of this global approach, reaching beyond regional boundaries for optimized development and operations of major accelerator facilities worldwide, to ensure active and productive future of the field.