Feynman diagram of a common pion decay. History Theoretical work by Hideki Yukawa in 1935 had predicted the existence of mesons as the carrier particles of the strong nuclear force. From the range of the nuclear force (inferred from the radius of the nucleus), Yukawa predicted the existence of...
Feynman diagram calculations are considerably simpler in the framework of Weyl-Van der Waerden spinors than in the standard formalism. We collect the basic formulae and illustrate the method by a few examples. We study pion pair decay in considerable detail and find that the long-standing ...
pion-pion interactionspion-kaon interactionsWe study the {eta}{sup {prime}}{r_arrow}{eta}{pi}{pi} decay within an effective chiral Lagrangian approach... AH Fariborz,J Schechter - 《Physics》 被引量: 51发表: 1999年 Pion kaon scattering near the threshold in chiral SU(2) perturbation theo...
is the pion decay constant and π(x) ≡π(x) · 1 2 τ, with τ denoting the Pauli matrices. The axial vector field a µ (x) and vector field v µ (x) are defined by a µ ≡ − i 2 (ξ † ∂ µ ξ −ξ∂ µ ξ † ) = a † µ = 1 2...
decay constant in the chiral limit). The nucleon isodoublet field Ψ = p n is decomposed using a time-like unit 4-vector v N v (x) = exp[imv · x]P + v Ψ(x) H v (x) = exp[imv · x]P − v Ψ(x) P ± v = 1 2 (1 ±/v) , v 2 = 1 (3) (where m is...
关键词: Lambda Particles Nucleon-Hyperon Interactions Amplitudes Coupling Constants Feynman Diagram Final-State Interactions Form Factors OPE Model Weak Particle Decay DOI: 10.1016/0375-9474(94)90780-3 被引量: 27 年份: 1994 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 全文购买 Else...
Mechanisms of induced Λ-hyperon decay revisited: Contribution of correlated two-pion exchangeLambda ParticlesNucleon-Hyperon InteractionsAmplitudesCoupling ConstantsFeynman DiagramFinal-State InteractionsForm FactorsOPE ModelWeak Particle DecayThe contribution of correlated ππ-exchange to the induced Λ-hyperon...
pion-proton interactionsparton modelantibaryonsbaryon resonancesfeynman diagrammass spectrameson resonancesIn the framework of the multiparton recombination model ... NN Badalian,GR Gulkanian,RG Badalian - Sov. J. Nucl. Phys. (Engl. Transl.); (United States) 被引量: 0发表: 1987年 ...
= 92.4 MeV the pion decay constant, and m π = 139.57 MeV the charged pion mass. Furthermore, q denotes the momentum transfer between both nucleons, and σ 1,2 and τ 1,2 are the usual spin- and isospin operators of the two nucleons. The Fourier transformation, ...
Feynman DiagramForm FactorsMomentum TransferWave FunctionsWeak Particle DecayEDB/645103Pions neutralA relativistic quark model wave function of the pion is obtained from a fit to the experimental data, including the charge radius, charge form factor and weak decay constant. The results are quite ...