Richness out of smallness: a Possible Staged Blueprint on Future Colliders

TL;DR

This paper proposes a staged blueprint for future high-energy colliders utilizing neutrino and lepton collisions, aiming to enhance physics research with innovative methods and intermediate facilities.

Contribution

It introduces a novel staged approach to collider development, emphasizing neutrino-based collisions as practical steps towards a future muon-muon collider.

Findings

Neutrino-neutrino collisions can probe heavy Majorana neutrinos.

High cross-section for neutrino-antineutrino annihilation into Z boson.

Lepton-neutrino collisions can improve W boson mass measurements.

Abstract

Novel collision methods and rich phenomena are crucial to keeping high-energy collision physics more robust and attractive. In this document, we present a staged blueprint for future high-energy colliders: from neutrino-neutrino collision, neutrino-lepton collision to electron-muon and muon-muon collisions. Neutrino beam from TeV scale muons is a good candidate to enrich high-energy collision programs and can serve as a practical step toward a high-energy muon collider, which still requires tens of years of R&D. Neutrinos-neutrinos collision provides a promising way to probe heavy Majorana neutrinos and effective neutrino mass; neutrino and antineutrino annihilation into Z boson has a huge cross-section at 10K pb level; leptons-neutrinos collision benefits W boson mass precision measurements. With only a minimal amount of integrated luminosity, one can envision the ``Richness out of smallness''. This document summarizes the current status and the roadmap towards the muon-muon collider with less challenging techniques required through intermediate facilities, where a wide variety of physics goals could be achieved. A (preparatory) laboratory on novel colliders could attract vast international interests and collaborations.