Detector R&D needs for the next generation $e^+e^-$ collider

TL;DR

This paper emphasizes the urgent need for the U.S. to lead and invest in detector R&D for the next-generation $e^+e^-$ collider, crucial for maintaining energy frontier leadership and enabling future discoveries.

Contribution

It outlines key areas where the U.S. can and should lead in the conceptual design and R&D efforts for $e^+e^-$ collider detectors.

Findings

U.S. has world-class detector expertise.

Strategic investments are necessary for future collider leadership.

Collaborative efforts can accelerate detector development.

Abstract

The 2021 Snowmass Energy Frontier panel wrote in its final report "The realization of a Higgs factory will require an immediate, vigorous and targeted detector R&D program". Both linear and circular $e^+e^-$ collider efforts have developed a conceptual design for their detectors and are aggressively pursuing a path to formalize these detector concepts. The U.S. has world-class expertise in particle detectors, and is eager to play a leading role in the next generation $e^+e^-$ collider, currently slated to become operational in the 2040s. It is urgent that the U.S. organize its efforts to provide leadership and make significant contributions in detector R&D. These investments are necessary to build and retain the U.S. expertise in detector R&D and future projects, enable significant contributions during the construction phase and maintain its leadership in the Energy Frontier regardless of the choice of the collider project. In this document, we discuss areas where the U.S. can and must play a leading role in the conceptual design and R&D for detectors for $e^+e^-$ colliders.