Review of Muon-Proton Collider Proposals: Main Parameters

Exploring muonphilic ALPs at $μ^+μ^-$ and $μp$ colliders

“…B. Exploring µ − p → ν µ aj at µp colliders We have selected collision energy values of E µ = 750 GeV and E p = 7 TeV as a benchmark example [54] for µp colliders in our search for µALPs from the µ − p → ν µ aj process. To simulate the experiment, we followed the same procedure as before, using pre-selection cuts (P µ T > 5 GeV, P j T > 20 GeV, |η µ | < 2.5 and |η j | < 5.0) at the parton-level for the signal and backgrounds.…”

“…Similarly, this kind of W --ν-a interaction with energy enhancement effect has also been proposed as a promising approach for the search of leptophilic ALPs via t-channel processes ( + − → ν aν and − p → ν aj) at high-energy colliders [48]. In this study, we investigated the production of GeV-scale µALPs from the above t-channel processes and their decay into a pair of muons at µ + µ − [49][50][51] and µp [52][53][54] colliders. Notably, when a light µALP is highly-boosted produced, the resulting pair of muons from the µALP decay is too collimated to pass the muon isolation criteria, and forms a novel object known as a muon-jet [55][56][57][58][59][60][61][62][63][64][65][66].…”