2021/08/27 by Timothy Hapitas, Douglas Tuckler, Yue Zhang
Physics and Astronomy · #Atomic and Subatomic Physics Research #Dark Matter and Cosmic Phenomena #Electron #Kinetic energy #Lepton #Mixing (physics) #Muon #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #astro-ph.CO #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.105.016014
25 pages, 11 figures
arxiv created 2021/08/27 · openalex publication_date 2022/01/18 · openalex created_date 2022/01/26 · arxiv updated 2022/02/02 · openalex updated_date 2026/08/05
The gauged U(1)_L_\ensuremathμ\ensuremath-L_\ensuremathτ extension of the Standard Model is a very simple framework that can alleviate the tension in muon anomalous magnetic dipole moment, reinforced by the recent Fermilab measurement. We explore experimental probes of the (g\ensuremath-2)_\ensuremathμ target with a general treatment of kinetic mixing between the Z^\ensuremath' gauge boson and the photon. The physical value of the kinetic mixing depends on a free parameter of the model and energy scale of a process. We find neutrino constraints on the (g\ensuremath-2)_\ensuremathμ target including Borexino, coherent elastic neutrino-nucleus scattering, and white dwarfs are sensitive to this freedom and can be lifted if the kinetic mixing lies in proximity of zero at low momentum transfer. As a further step, we explore L_\ensuremathμ\ensuremath-L_\ensuremathτ charged dark matter with a thermal origin and show that the same scenario of kinetic mixing can relax existing direct detection constraints and predict novel recoil energy dependence in the upcoming searches. Future joint effort of neutrino and dark matter experiments and precision spectral measurement will be the key to test such a theory.