Improved search for two body muon decay μ+→e+XH

2020/02/29 by A. A. Aguilar-Arevalo, A. Aguilar-Arevalo, M. Aoki +30 · 1 citation
Physics and Astronomy · #Branching fraction #Dark Matter and Cosmic Phenomena #Electron #Energy (signal processing) #Lepton #Muon #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #hep-ex #nucl-ex

paper · pdf · doi:10.1103/physrevd.101.052014

published as Phys. Rev. D 101, 052014 (2020) · 3 pages, 2 figures

openalex created_date 2020/03/06 · arxiv created 2020/03/14 · openalex publication_date 2020/03/31 · arxiv updated 2020/04/08 · openalex updated_date 2026/08/05

Abstract

Charged lepton flavor violating muon decay \ensuremathμ⁺\ensuremath→e⁺X_H, where X_H is a massive neutral boson, was sought by searching for extra peaks in the muon decay \ensuremathμ⁺\ensuremath→e⁺\ensuremathν\ensuremathν energy spectrum in the m_X_H mass region 47.8--95.1 MeV/c². No signal was found and 90% confidence level upper limits were set on the branching ratio \mathrm\ensuremathΓ(\ensuremathμ⁺\ensuremath→e⁺X_H)/\mathrm\ensuremathΓ(\ensuremathμ⁺\ensuremath→e⁺\ensuremathν\ensuremathν) at the level of 10^\ensuremath-5 for this region.

Citations

• High purity pion beam at TRIUMF
• The Low-Energy Frontier of Particle Physics

Cited by

• Searching for the dark sector in two-body antimuon decay with the polarization of monochromatic positrons