You can draw a diagram, but it's probably not a Feynman diagram. They represent formal terms in a perturbation theory expansion of a scattering amplitude in a relativistic quantum field theory. Meanwhile, alpha and gamma decays are more decay amplitudes a la Fermi's Golden Rule....
In this section, we discuss the complete set of polarization observables of a spin-1 particle in a generic production process and the method to extract them from the distribution of its decay products. Fig. 1 Feynman diagram for a general process for production of spin-1 particle (Z boson)...
Feynman diagramParticle decayParticle widthsPhotonsPions neutralThe eta implies pi exp 0 gamma gamma decay is investigated in the framework of the quantum chiral theory. It is found that this decay is closer related to the process eta implies pi exp + pi exp - pi exp 0 by adding a meson ...
We also apply the pole model to calculate the Bq meson decay. The main contribution here is the radiative transition of the Bq meson into an intermediate (virtual)B∗. The Feynman diagram is shown in Fig.3.The subsequent process B∗→ν¯νis determined in SM by the e,ective Hamilt...
展开 关键词: physics of elementary particles and fields d s mesons hadronic particle decay glueballs kaons neutral short-lived radiative decay branching ratio eta-1440 mesons feynman diagram kobayashi-maskawa matrix DOI: 10.1103/PHYSREVLETT.64.1003 被引量: 2 年份...
It is found that this decay is closer related to the process eta implies pi exp + pi exp - pi exp 0 by adding a meson loop than to the process eta implies gamma gamma going via a baryon loop. The theoretical estimates of eta implies pi exp 0 gamma gamma decay width are in sharp ...
In a Feynman diagrammatic picture, higher order terms such as a ladder diagramdepicted in Fig.1, significantly contribute to the cross section, because an intermediate sfermion pair is almost on-shell. Thus, we have to resum the ladder diagram for a reliable calculation. The non-relativistic...
6.1. ϕn± production and decay at the LHC At the LHC, the electroweak multiplet ϕ would be produced mostly in Drell–Yan pair production processes. In Fig. 5, we show the expected production cross sections at center of mass energies of 8 and 14 TeV. We see that, especially for...
2. In general, we cannot distinguish between the photon emission from top quark production and decay. As a result, the non-negligible interference effects between these two types need to be considered. Fig. 2 Additional Feynman diagrams contributing to lνbγ production in proton–proton ...
关键词: physics of elementary particles and fields d neutral mesons radiative decay d s mesons branching ratio cabibbo angle color model d plus mesons feynman diagram gauge invariance 年份: 1991 收藏 引用 批量引用 报错 分享 全部来源 求助全文 ResearchGate osti.gov 相似文献Stage-two spin-...