"Direct Extraction of Multiloop Integral Coefficients," by Mads Søgaard (Niels Bohr Institute)

Monday, September 29, 2014 - 3:00pm to 4:00pm
TEP Seminars

TEP Seminar

Physics and Astronomy Building (PAB) Room 4-330
Monday, September 29, 2014

Guest Speaker: Mads Søgaard (Niels Bohr Institute)

Talk Title: "Direct Extraction of Multiloop Integral Coefficients"


Multiloop amplitudes can be written in a basis of integrals. We show how to compute the coefficients using maximal unitarity cuts and computational algebraic geometry. The coefficients are expressed as products of tree-level amplitudes integrated over multidimensional contours. The method is applied to planar and nonplanar two- and three-loop examples in generic gauge theories. We also discuss generalized cuts of integrals with higher powers of propagators.