Open AccessMHV techniques for QED processes
Author(s) -
Kemal Ozeren,
W.James Stirling
Publication year - 2005
Publication title -
journal of high energy physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.998
H-Index - 261
eISSN - 1126-6708
pISSN - 1029-8479
DOI - 10.1088/1126-6708/2005/11/016
Subject(s) - spinor , physics , quantum chromodynamics , gauge theory , theoretical physics , tree (set theory) , recursion (computer science) , photon , particle physics , mathematical physics , quantum mechanics , computer science , mathematics , mathematical analysis , algorithm
Significant progress has been made in the past year in developing new `MHV'techniques for calculating multiparticle scattering amplitudes in Yang-Millsgauge theories. Most of the work so far has focussed on applications to QuantumChromodynamics, both at tree and one-loop level. We show how such techniquescan also be applied to abelian theories such as QED, by studying the simplesttree-level multiparticle process, e^+e^- to n \gamma. We compare explicitresults for up to n=5 photons using both the Cachazo, Svrcek and Witten `MHVrules' and the related Britto-Cachazo-Feng `recursion relation' approaches withthose using traditional spinor techniques.Comment: 19 pages, 10 figures. References adde
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