A Leptonic ALP Portal to the Dark Sector

Autor:	Armando, Giovanni, Panci, Paolo, Weiss, Joachim, Ziegler, Robert
Rok vydání:	2023
Předmět:	High Energy Physics - Phenomenology Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.109.055029
Popis:	We discuss the leptonic ALP portal as a simple scenario that connects observed discrepancies in anomalous magnetic moments to the Dark Matter relic abundance. In this framework an axion-like particle in the multi-MeV range couples to SM leptons and a DM fermion, with mass above the ALP mass but below a GeV. The ALP contributes to $(g-2)_\mu$ and $(g-2)_e$ dominantly through 2-loop Barr-Zee diagrams, while the DM abundance is generated by $p$-wave annihilation to ALP pairs. Constraints from beam-dump experiments, colliders and CMB probes are very stringent, and restrict the viable parameter space to a rather narrow region that will be tested in the near future. Comment: 12 pages, 5 figures; v2: some clarifications and references added; conclusions unchanged; version published in PRD
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2310.05827 Zobrazit plný text záznamu View this record from Arxiv