The MHV QCD Lagrangian

Details The MHV QCD Lagrangian The MHV QCD Lagrangian

2008-05-02

arxiv.org/abs/0805.0239v2

JHEP 0808:103,2008

Physics

High Energy Physics

High Energy Physics - Theory

**Important New Material:** Proof that vertices are MHV amps off-shell, **Plus** results for all MHV verts with massive quarks

Scientific paper

10.1088/1126-6708/2008/08/103

We perform a canonical change of the field variables of light-cone gauge massless QCD to obtain a lagrangian whose terms are proportional up to polarisation factors to MHV amplitudes and continued off shell by the CSW prescription. We solve for this transformation as a series expansion to all orders in the new fields, and use this to prove that the resulting vertices are indeed MHV vertices as claimed. We also demonstrate how this works explicitly for the vertices with: two quarks and two gluons, four quarks, and a particular helicity configuration of two quarks and three gluons. Finally, we generalise the construction to massive QCD.

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