Regular Article - Theoretical Physics
External leg amputation in conformal-invariant three-point function
Department of Theoretical Physics, Indian Association for the Cultivation of Science, 2A & 2B, Raja S. C. Mullick Road, Kolkata, 700032, India
2 Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
Revised: 10 March 2011
Published online: 19 April 2011
Amputation of external legs is carried out explicitly for the conformal-invariant three-point function involving two spinors and one vector field. Our results are consistent with the general result that amputating an external leg in a conformal-invariant Green function replaces a field by its conformal partner in the Green function. A new star-triangle relation, involving two spinors and one vector field, is derived and used for the calculation.
© Springer-Verlag / Società Italiana di Fisica, 2011