Leptophilic gauge bosons at lepton beam dump experiments

Abstract It has been recently known that we can use beams of future lepton colliders, the International Linear Collider (ILC), the Compact Linear Collider (CLIC), and the muon collider, for beam dump experiment if a shield and a detector are installed behind the beam dump. We study the prospect of searching for leptophilic gauge bosons (LGBs) in association with U 1 L e − L μ $$\textrm{U}{(1)}_{L_e-{L}_{\mu }}$$ , U 1 L e − L τ $$\textrm{U}{(1)}_{L_e-{L}_{\tau }}$$ , and U 1 L μ − L τ $$\textrm{U}{(1)}_{L_{\mu }-{L}_{\tau }}$$ gauge symmetries at such lepton beam dump experiments. We perform a detailed calculation of the number of the LGB events, taking into account bremsstrahlung and pair-annihilation processes. We show that the lepton beam dump experiments at future lepton colliders can reach parameter regions which have not been covered

Search for WIMPs at future μ + μ + colliders

Abstract Weakly interacting massive particles (WIMPs) with electroweak charges, such as the wino and the Higgsino, stand out as natural candidates for dark matter in the universe. In this paper, we study the search for WIMPs at future multi-TeV μ + μ + colliders. We investigate both the direct production search of WIMPs through the mono-muon channel and the indirect search through quantum corrections in elastic μ + μ + Møller scattering. We find that the indirect search has an advantage over the direct search with sufficient luminosities, O ab − 1 $$\mathcal{O}\left({\textrm{ab}}^{-1}\right)$$ , and low systematic uncertainties, ≲ 0.3 %. This advantage arises due to the weaker mass dependence observed in the indirect search in comparison to direct production methods. The advantage is further enhanced if the initial muon beams are polarized. Specifically, we demonstrate that the indirect search method can detect the thermal mass target for the wino and the Higgsino for s $$\sqrt{s}$$ = 6 TeV and 2 TeV (with s $$\sqrt{s}$$ being the center of mass energy), respectively, with 10 ab −1, an 80 % polarized beam and an accuracy of 0.1 %. Our findings illuminate the potential of future high-energy μ + μ + colliders in advancing our understanding of dark matter

The International Linear Collider: Report to Snowmass 2021

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. Its experiments will challenge the Standard Model of particle physics and will provide a new window to look beyond it. This document brings the story of the ILC up to date, emphasizing its strong physics motivation, its readiness for construction, and the opportunity it presents to the US and the global particle physics community

The International Linear Collider: Report to Snowmass 2021

International audienceThe International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. Its experiments will challenge the Standard Model of particle physics and will provide a new window to look beyond it. This document brings the story of the ILC up to date, emphasizing its strong physics motivation, its readiness for construction, and the opportunity it presents to the US and the global particle physics community

The International Linear Collider: Report to Snowmass 2021

The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our current understanding of particle physics. It is based on a proven accelerator technology. Its experiments will challenge the Standard Model of particle physics and will provide a new window to look beyond it. This document brings the story of the ILC up to date, emphasizing its strong physics motivation, its readiness for construction, and the opportunity it presents to the US and the global particle physics community