Jacob Bourjaily

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We give an explicit recursive formula for the all `-loop integrand for scattering amplitudes in N = 4 SYM in the planar limit, manifesting the full Yangian symmetry of the theory. This generalizes the BCFW recursion relation for tree amplitudes to all loop orders, and extends the Grassmannian duality for leading singularities to the full amplitude. It also(More)
N. Arkani-Hamed, J. Bourjaily, F. Cachazo, A. Goncharov, A. Postnikov, and J. Trnka a School of Natural Sciences, Institute for Advanced Study, Princeton, NJ b Department of Physics, Harvard University, Cambridge, MA c Perimeter Institute for Theoretical Physics, Waterloo, Ontario, CA d Department of Mathematics, Yale University, New Haven CT e Department(More)
Although neurogenic bowel is a major sequelae of spinal cord injury (SCI), little is known about long-term outcomes of bowel management. The major purposes of this study were to: 1) describe bowel management programs, 2) determine the prevalence of gastrointestinal (GI) complaints, including evacuation problems and GI symptoms, 3) describe the impact of(More)
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