2020/01/31 by Aliaksei Kachanovich, Ulrich Nierste, Ivan Nišandžić · 1 citation
Physics and Astronomy · #Boson #Branching fraction #Dark Matter and Cosmic Phenomena #Electron #Higgs boson #Lepton #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.101.073003
published as Phys. Rev. D 101, 073003 (2020) · 17 pages, 8 figures, 2 ancillary files; v2: missed color factor added, plots and results changed accordingly, matches the corrected version to appear in PRD
openalex created_date 2020/01/30 · openalex publication_date 2020/04/16 · arxiv created 2020/11/30 · arxiv updated 2020/12/02 · openalex updated_date 2026/08/05
We present new calculations of the differential decay rates for H\ensuremath→\ensuremathℓ+\ensuremathℓ^\ensuremath-\ensuremathγ with \ensuremathℓ=e or \ensuremathμ in the Standard Model. The branching fractions and forward-backward asymmetries, defined in terms of the flight direction of the photon relative to the lepton momenta, depend on the cuts on energies and invariant masses of the final state particles. For typical choices of these cuts we find the branching ratios B(H\ensuremath→ee\ensuremathγ)=5.8\ifmmode×\else\texttimes\fi10^\ensuremath-5 and B(H\ensuremath→\ensuremathμ\ensuremathμ\ensuremathγ)=6.4\ifmmode×\else\texttimes\fi10^\ensuremath-5 and the forward-backward asymmetries AFB(e)=0.343 and AFB^(\ensuremathμ)=0.255. We provide compact analytic expressions for the differential decay rates for the use in experimental analyses.