32 Electron Positron Annihilation Feynman Diagram


Schroeder department of physics weber state university. The weak interaction would be responsible for annihilation into a z 0 at high energy.

Feynman diagram for the electron positron Annihilation

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Electron positron annihilation feynman diagram. There are two feynman diagrams related to this process to the lowest order of alpha. The total energy and momentum of the initial pair are conserved in the process and distributed among a set of other particles in the final state. I wonder which fundamental interaction is involved in the electron positron annihilation.

A feynman diagram represents a perturbative contribution to the amplitude of a quantum transition from some initial quantum state to some final quantum state. Quark annihilation into two gluons. Const 2 each diagram representsa complex number that dependson e and.

Active 2 years 4 months ago. Feynman diagram and uncertainty. I understand why one cannot have the annihilation of positron and electron to give one photon but the reason youve given why i cannot simply draw an x shaped diagram no virtual particle is that qed deals only with 3 particle vertices.

Feynman diagram of electronpositron pair production. I still dont understand why it has to be a virtual electronpositron. Feynman diagrams and electron positron annihilation.

Interpretation of bhabhasformula r. For example in the process of electron positron annihilation the initial state is one electron and one positron the final state. Viewed 3k times 3.

Tree level feynman diagrams of electron positron interaction. Thanks warut 1725 17 january 2008 utc for annihilation to two photons it is electromagnetic. That should be clear from its feynman diagram.

Stack exchange network consists of 175 qa communities including stack. This is the web site for a set of curricular materials that im working on. Ask question asked 5 years 6 months ago.

Feynman diagram for annihilation. One can calculate multiple diagrams to get the cross section the exact analytic form for the cross section of pair production must be calculated through quantum electrodynamics in the form of feynman diagrams and results in a complicated function. 1 begingroup what is the difference between these two feynman diagrams.

Schroeder 29 october 2002. In particle physics annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles such as an electron colliding with a positron to produce two photons.

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