Description:

Title: Higher-order predictions via the generalized double-copy

Speaker: John Jospeh Carrasco, Theoretical Physics, CEA-Saclay & University of Paris-Saclay
 

Abstract: Recent conceptual advances have allowed us to delve further than ever before into the quantum corrections to scattering amplitudes, perhaps nature's most perfect microscopic structures. Doing so we have uncovered the surprisingly powerful relations known as the color-kinematics duality, and associated double-copy structure. Universal to many theories from the entirely formal to the utterly effective, these structures apply to processes from pion scattering to perturbative QCD to classical black hole scattering and to cosmic inflation. Exploiting these relations to calculate has tremendous computational advantages, but manifesting the necessary duality can still be challenging in higher loop corrections. After gently reviewing this local off-shell story, I will introduce a new approach that starts from generically organized scattering multi-loop integrands and uses a modified double-copy procedure to obtain related double-copy integrands. I will demonstrate with three-, four- and five-loop examples. 

Keywords: Physics, Astronomy, HEP