2004/08/01 by Maxim Dvornikov, M. S. Dvornikov, Alexander Studenikin +1 · 46 citations
Physics and Astronomy · #Dipole #Feynman diagram #Form factor (electronics) #Gauge (firearms) #Magnetic dipole #Magnetic moment #Magnetic monopole #Momentum (technical analysis) #Neutrino #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum and Classical Electrodynamics #Recoil #hep-ph
paper · pdf · doi:10.1134/1.1800181
published in Journal of Experimental and Theoretical Physics 99(2), 254-269 (Pleiades Publishing) · 16 pares with 5 figures in pdf format
openalex publication_date 2004/08/01 · arxiv created 2004/11/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Electromagnetic form factors of a massive neutrino are studied in a minimally extended standard model in an arbitrary R ξ gauge and taking into account the dependence on the masses of all interacting particles. The contribution from all Feynman diagrams to the electric, magnetic, and anapole form factors, in which the dependence of the masses of all particles as well as on gauge parameters is accounted for exactly, are obtained for the first time in explicit form. The asymptotic behavior of the magnetic form factor for large negative squares of the momentum of an external photon is analyzed and the expression for the anapole moment of a massive neutrino is derived. The results are generalized to the case of mixing between various flavors of the neutrino. Explicit expressions are obtained for the electric, magnetic, and electric dipole and anapole transitional form factors as well as for the transitional electric dipole moment.