2013/10/20 by Lance J. Dixon · 2 citations
Physics and Astronomy · #hep-ph #hep-th
paper · pdf · doi:10.5170/cern-2014-008.31
published as CERN-2014-008, pp. 31-67 · 48 pages, 15 figures. Lectures presented at the 2012 European School of High-Energy Physics and at TASI 2013
arxiv created 2013/10/20 · arxiv updated 2015/06/02
I provide a basic introduction to modern helicity amplitude methods, including color organization, the spinor helicity formalism, and factorization properties. I also describe the BCFW (on-shell) recursion relation at tree level, and explain how similar ideas - unitarity and on-shell methods - work at the loop level. These notes are based on lectures delivered at the 2012 CERN Summer School and at TASI 2013.