Faculty

	Freddy Cachazo PhD Harvard (2002) Superstring Theory
	Phone:	(519) 569-7600 x8501
	Email:	fcachazo[at]perimeterinstitute.ca

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Research Interests

In recent years it has become clear that the S-matrix of massless particles is a very special object. Ideas stemming from the analytic approach of the S-matrix and twistor theory have led to insights into new ways of thinking about locality in space-time. A dual or new formulation of the S-matrix of N=4 SYM has been constructed in terms of a multidimensional contour integral in a Grassmannian manifold. The dual formulation makes manifest a Yangian symmetry which is hidden in the standard Feynman diagram formulation. The integrand of the full planar theory has been found in a manifestly Yangian form.

Positions Held

• September 2009 - June 2010 School of Natural Sciences. Institute for Advanced Study. Princeton NJ. Member.
• 2005-present. Perimeter Institute. Faculty Member
• 2002-2005 School of Natural Sciences. Institute for Advanced Study. Princeton NJ. Postdoctoral Member.

Awards

• 2009 Gribov Medal, European Physical Society (EPS)
• Early Reseach Award of Ontario (ERA).

Recent Publications

• Unification of Residues and Grassmannian Dualities Authors: Nima Arkani-Hamed, Jacob Bourjaily, Freddy Cachazo, Jaroslav Trnka, arxiv: 0912.4912
• Local Spacetime Physics from the Grassmannian Authors: Nima Arkani-Hamed, Jacob Bourjaily, Freddy Cachazo, Jaroslav Trnka, arxiv: 0912.3249
• The Grassmannian Origin Of Dual Superconformal Invariance, Nima Arkani-Hamed, Freddy Cachazo, Clifford Cheung, . arxiv: 0909.0483
• N. Arkani-Hamed, F. Cachazo, C. Cheung and J. Kaplan, A Duality For The S Matrix, arxiv: 0907.5418
• N. Arkani-Hamed, F. Cachazo, C. Cheung and J. Kaplan, The S-Matrix in Twistor Space, arxiv: 0903.2110
• N. Arkani-Hamed, F. Cachazo and J. Kaplan, What is the Simplest Quantum Field Theory?, arxiv: 0808.1446
• On the structure of scattering amplitudes in N=4 super Yang-Mills and N=8 supergravity, Freddy Cachazo, David Skinner, arxiv: 0801.4574

Seminars

• PiTP. Aspects of Supersymmetry, Institute for Advanced Study, Princeton, New Jersey, USA, July 2010
• XVIth European Workshop on String Theory, Spain, June 2010
• Gribov-80 Memorial Symposium, Abdus Salam ICTP, Trieste, Italy, May 2010
• Joint theory seminar, Harvard University, Cambridge, Massachusetts, USA, April 2010
• The Simons Center for Geometry and Physics, New York, USA, February 2010
• APS ``April" Meeting, Washington, DC, USA, February 2010
• S-Matrix Theory. Abdus Salam ICTP. Trieste. Italy.
• What is the simplest quantum field theory?. Strings 2008. CERN.
• BIRS String Workshop, Banff, Alberta, Canada, February 2006
• STRINGS 2005, University of Toronto, Canada, July 2005
• CMS/CSHPM Summer 2005 Meeting, String Theory and Integrable Systems Session, University of Waterloo, Waterloo, Canada, June 2005
• QCD and String Theory, KITP, Santa Barbara, USA, November 2004
• 28th Johns Hopkins Workshop on Current Problems in Particle Theory: Hyperspace, Superspace, Theory Space and Outer Space, Baltimore, Maryland, USA, Jun 2004
• PIRSA:09010009, The S-matrix reloaded, 2009-01-21, Colloquium