Electromagnetic Mass Difference of Elementary Particles
スポンサーリンク
概要
- 論文の詳細を見る
We propose to examine whether the observed mass difference between the members of each charge multiplet, for both baryons and mesons, can be explained in terms of an electromagnetic self-energy. The electromagnetic form factor is introduced to play the role of cutoff factor, and the isospace transformation property of each individual elementary particle is taken into account for the phenomenologically assumed form factor. The following results are obtained from the e^2-order self-energy calculation: (i) The observed neutron-proton mass difference (2.5m_e) may be explained using the suitable form factor which is assumed to agree with the empirical one for the momentum transfer below l Bev/c. The desirable behavior of the form factor for the higher momentum transfer is shown with a few examples, which may suggest some information about the inner structure of the nucleon. The calculated mass difference has no direct close connection with the rootmean-square radius of the charge or magnetic moment distribution, but strongly depends upon the higher momentum behavior of the form factor. (ii) The similar argument seems favorable for understanding that the observed Σ^--Σ^+ mass difference is considerably larger (13m_e), while (M__<Σ^+>+M__<Σ^->)/2-M_<Σ^0> is comparatively small (~1.5m_e). (iii) Both the observed π^±-π^0 mass difference (9m_e) and the observed K^0(K^^-^0)-K^± mass difference (8m_e) may also be understood, if the suitable form factors are assumed according to the isospace transformation property of each meson. (iv) Although no experimental data have been made available about the Ξ^0-Ξ^- mass difference with sufficient accuracy, the argument similar to that for the nucleon leads to some conjectures. Finally, the strong interaction corrections to the mass shift are estimated for the baryons and mesons in the lowest approximation of g^2. This effect cannot be thoroughly neglected, but in most cases it seems to be regarded as a small correction to the main electromagnetic effect.
- 理論物理学刊行会の論文
- 1960-07-25
著者
-
Katsumori Hiroshi
Department Of Applied Physics Chubu Institute Of Technology
-
Katsumori Hiroshi
Department Of Physics Osaka Gakugei University
-
KATSUMORI Hiroshi
Department of Physics, Osaka Gakugei University
-
Katsumori H.
Department of Physics, Osaka Gakugei University
関連論文
- Finite Size Effects and Pseudocritical Behavior. I : Ising Spin and Lattice Gauge Models
- Short-Term Plasticity of Hippocampal Neuropeptides and Neuronal Circuitry in Experimental Status Epilepticus
- Self-Sustaining Status Epilepticus : A Condition Maintained by Potentiation of Glutamate Receptors and by Plastic Changes in Substance P and Other Peptide Neuromodulators
- Specific Heat of Three-Dimensional Ising Model
- Successive Screw Approximation in Ising Lattice Gauge Theory
- Three-Dimensional Anisotropic Ising Lattice
- On the Theory of Cooperative Phenomena
- Empirical Formulas of Electromagnetic Mass Difference and Baryon Magnetic Moment
- Finite Size Effects and Pseudocritical Behavior. II : Potts Spin Model
- Linearly Rising Regge Trajectories and Strong Mass Splitting of Baryons
- Electromagnetic Mass Shift of Σ Hyperons
- Hirayama's and Muta's Relations as a Finite Mass Difference Condition
- Mass Spectra of Baryons, Mesons and Leptons
- A Phenomenological Mass Formula for Leptons and Quarks : Particles and Fields
- Electromagnetic Properties of Resonant States
- Electromagnetic Vertex for Σ^0→Λ^0+γ
- Mass Levels of Spin 3/2 Resonant States and Ω^- Baryon
- Electromagnetic Mass Difference of Elementary Particles