Compact Feynman rules for Majorana fermions

  title={Compact Feynman rules for Majorana fermions},
  author={Ansgar Denner and H. N. van Eck and O. Hahn and Jill Kublbeck},
  journal={Physics Letters B},
We present simple algorithmic Feynman rules for Majorana fermions. Insisting on a fermion flow through the graphs along fermion lines we only need the familiar Dirac propagator and only vertices without explicit charge-conjugation matrices; moreover, we get the correct relative signs between different interfering Feynman graphs as in the case of Dirac fermions. 
Majoranized Feynman rules
We point out that the compact Feynman rules for Majorana fermions proposed by Denner et al. are in fact a convention for the complex phases of (anti)spinors, valid for both Majorana and DiracExpand
Recursive equations for Majorana currents
A recursive computation of scattering amplitudes including Majorana fermions requires a consistent definition of the fermion flow, which is introduced by Denner et al. in a diagrammatic setting. AExpand
Dirac and Majorana Feynman Rules with four-fermions
A compact method for amplitude calculations in theories with Dirac and Majorana effective operators is discussed. Using the renormalizable formalism of Denner et al., [1,2] for propagators, verticesExpand
Primary Feynman rules to calculate the ∊-dimensional integrand of any 1-loop amplitude
A bstractWhen using dimensional regularization/reduction the ∊-dimensional numerator of the 1-loop Feynman diagrams gives rise to rational contributions. I list the set of fundamental rules thatExpand
Diagonalization of the neutralino mass matrix and boson–neutralino interaction
We analyze a connection between the neutralino mass sign, parity and structure of the neutralino–boson interaction. Correct calculation of spin-dependent and spin-independent contributions toExpand
Renormalization of lepton mixing for Majorana neutrinos
Abstract We discuss the one-loop electroweak renormalization of the leptonic mixing matrix in the case of Majorana neutrinos, and establish its relationship with the renormalization group evolutionExpand
Renormalization of the Complex MSSM in FeynArts/FormCalc
Abstract The consistent renormalization of all relevant sectors of the MSSM with complex parameters (cMSSM) and the inclusion in the FeynArts / FormCalc package has recently been completed and isExpand
Selection rules for the decay of a particle into two identical massless particles of any spin
The well-known Landau-Yang (LY) theorem on the decay of a neutral particle into two photons is generalized for analyzing the decay of a neutral or charged particle into two identical masslessExpand
Majorana vs pseudo-Dirac neutrinos at the ILC
Neutrino masses could originate in seesaw models testable at colliders, with light mediators and an approximate lepton number symmetry. The minimal model of this type contains two quasi-degenerateExpand
Photino and Gluino Production in SQED and SQCD
This review starts out with a brief history of the photino–gluino phenomenology. Next, it describes difficulties encountered in the construction of Feynman amplitudes when dealing with MajoranaExpand


Majorana Feynman rules.
  • Gates, Kowalski
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1988
New graphical rules which resemble those for Dirac fermions in their natural association of momentum and fermion flows are proposed that have only those signature problems normally expected for fermIONS. Expand
Feynman rules for Majorana-neutrino interactions.
  • Gluza, Zralek
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1992
Simple Feynman rules for Majorana neutrinos and Dirac fermions interacting with spin-1 or spin-0 bosons are presented. Several examples using these rules are given.
Leptoproduction of supersymmetric particles
Abstract We study the production of scalar leptons ( l ) , scalar quarks ( q ) and gluinos ( g ) in ep → ν X , and ep → e X and the associated production of q and g in ep → eX and ep → νX. We findExpand
The Search for Supersymmetry: Probing Physics Beyond the Standard Model
Abstract In this paper we survey methods by which supersymmetry (or other new physics) could be observed in experiments at present and future accelerators. We review some of the motivation forExpand