Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-04-02
JHEP0707:002,2007
Physics
High Energy Physics
High Energy Physics - Theory
40 pages. v2: Minor corrections, references added. Published version
Scientific paper
10.1088/1126-6708/2007/07/002
It has been known for some time that the standard MHV diagram formulation of perturbative Yang-Mills theory is incomplete, as it misses rational terms in one-loop scattering amplitudes of pure Yang-Mills. We propose that certain Lorentz violating counterterms, when expressed in the field variables which give rise to standard MHV vertices, produce precisely these missing terms. These counterterms appear when Yang-Mills is treated with a regulator, introduced by Thorn and collaborators, which arises in worldsheet formulations of Yang-Mills theory in the lightcone gauge. As an illustration of our proposal, we show that a simple one-loop, two-point counterterm is the generating function for the infinite sequence of one-loop, all-plus helicity amplitudes in pure Yang-Mills, in complete agreement with known expressions.
Brandhuber Andreas
Spence Bill
Travaglini Gabriele
Zoubos Konstantinos
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