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Dirac_Spinors.md
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--- # Dirac Spinors
title: Dirac Spinors
permalink: /Dirac_Spinors/
---
[Category:Model](/Category:Model "wikilink") Event generators and programs for calculating Feynman Diagrams are normally written for Dirac spinors, but SARAH does all internal calculations for Weyl spinors. Therefore, it is necessary to define, how the Weyl spinors combine to Dirac spinors. That can be done for each all eigenstates separately Event generators and programs for calculating Feynman Diagrams are normally written for Dirac spinors, but SARAH does all internal calculations for Weyl spinors. Therefore, it is necessary to define, how the Weyl spinors combine to Dirac spinors. That can be done for each all eigenstates separately
DEFINITION[$EIGENSTATES][DiracSpinors]={ DEFINITION[$EIGENSTATES][DiracSpinors]={
Dirac Spinor -> {Weyl 1, Weyl 2}, Dirac Spinor -> {Weyl 1, Weyl 2},
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