Science Case for the new High-Intensity Muon Beams HIMB at PSI

TL;DR

The paper advocates for the HIMB project at PSI, highlighting its potential to enable groundbreaking experiments across physics, chemistry, and energy research through high-intensity muon beams.

Contribution

It presents a comprehensive physics case for the new high-intensity muon beams at PSI, emphasizing their broad scientific applications and competitive advantage.

Findings

High-intensity muon beams enable new experiments with discovery potential.

HIMB will maintain PSI's leadership in muon research.

The facility supports diverse scientific fields including particle physics, chemistry, and energy.

Abstract

In April 2021, scientists active in muon physics met to discuss and work out the physics case for the new High-Intensity Muon Beams (HIMB) project at PSI that could deliver of order $10^{10}$\,s$^{-1}$ surface muons to experiments. Ideas and concrete proposals were further substantiated over the following months and assembled in the present document. The high intensities will allow for completely new experiments with considerable discovery potential and unique sensitivities. The physics case is outstanding and extremely rich, ranging from fundamental particle physics via chemistry to condensed matter research and applications in energy research and elemental analysis. In all these fields, HIMB will ensure that the facilities S$\mu$S and CHRISP on PSI's High Intensity Proton Accelerator complex HIPA remain world-leading, despite the competition of muon facilities elsewhere.