2024/10/27 by Leyun Gao, Zijian Wang, Gao, Leyun +13
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Neutrino Physics Research #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2410.20323
openalex publication_date 2024/10/27 · openalex created_date 2024/11/14 · openalex updated_date 2026/07/28
This work proposes a new yet economical experiment to probe the charged lepton flavor violation (CLFV) process mediated by an extra massive neutron gauge boson Z^′ beyond the standard model, by extending a recently proposed muon dark matter project in the Peking University Muon (PKMuon) Experiment. The devices used originally for light mass dark matter direct detection are easily adaptable to search for the μ+e- → μ+μ- CLFV process leveraging the large-area, high-precision muon tracking and tomography system sandwiching a fixed target the incoming muons scatter off. The μ+μ- final state signal studied in this work can be uniquely sensitive to specific CLFV parameter combinations, such as the couplings between Z^′, electron and muon, or Z^′ and two muons. Prospected results are obtained through detailed detector simulation for the proposal interfacing with a muon beam with energy at tens of GeV and a flux of 106 \mathrms-1. Based mainly on angular information of the incoming and outgoing particles, the expected upper limit at 95% confidence level on the coupling coefficients λeμλμμ is able to reach 10-5 with, for example, Z^′ mass 0.25 GeV, for a one year's run.