Twistor-inspired recursive techniques in QCD

by Achilleas Lazopoulos (University of Hawaii, Manoa)

Tuesday Feb 6, 2007, 3:00 PM → 4:00 PM Pacific/Honolulu

WAT 417 (University of Hawai'i, Manoa)

Recursive techniques for the evaluation of tree-level amplitudes have been proven extremely useful in the past.
During the last couple of years a novel recursion relation for the calculation of tree-level gluon amplitudes in QCD, suggested by Britto, Cachazo, Feng and Witten has triggered some developments and a good deal of enthusiasm in the field.
In this talk an introduction of the method will be presented, along with its extensions for massive fermions and vector bosons. A connection with the traditional Feynman diagrams approach will be sketched followed by some applications in tree-level and one-loop diagram calculations.
Note: although the BCFW recursion relation is inspired by E. Witten's considerations in twisto space, no knowledge of twistor geometry is needed to understand, prove the validity of, or, use the BCFW recursion relations.
Organizer: J.G. Learned