{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/lepton-flavor-violating-alp-signals-with-tev","title":"Lepton-Flavor-Violating ALP Signals with TeV-Scale Muon Beams","arxiv_id":"2407.15942","date":"2024-07-22","proceeding":null,"authors":["Brian Batell","Hooman Davoudiasl","Roman Marcarelli","Ethan T. Neil","Sebastian Trojanowski"],"abstract":"We explore the feasibility of using TeV-energy muons to probe lepton-flavor-violating (LFV) processes mediated by an axion-like particle (ALP) $a$ with mass $\\mathcal{O}(10~\\textrm{GeV})$. We focus on $\\mu\\tau$ LFV interactions and assume that the ALP is coupled to a dark state $\\chi$, which can be either less or more massive than $a$. Such a setup is demonstrated to be consistent with $\\chi$ being a candidate for dark matter, in the experimentally relevant regime of parameters. We consider the currently operating NA64-$\\mu$ experiment and proposed FASER$\\nu$2 detector as both the target and the detector for the process $\\mu A \\to \\tau A\\, a$, where $A$ is the target nucleus. We also show that a possible future active muon fixed-target experiment operating at a 3 TeV muon collider or in its preparatory phase can provide an impressive reach for the LFV process considered, with future FASER$\\nu$2 data providing a pilot study towards that goal. The implications of the muon anomalous magnetic moment $(g-2)_\\mu$ measurements for the underlying model, in case of a positive signal, are also examined, and a sample UV completion is outlined.","url_abs":"https://arxiv.org/abs/2407.15942v2","url_pdf":"https://arxiv.org/pdf/2407.15942v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"lepton-flavor-violating-alp-signals-with-tev","repo_url":"https://github.com/strojanowski/ALPsLFV","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}