Contact Information: Institute for Advanced Study
School of Natural Sciences
Einstein Drive
Princeton, NJ 08540
Phone: 6097348078
Fax: 6099247592
Email: arkani@ias.edu
Academic Assistant
Michele Turansick
Phone: 6097348058
Email: mat@ias.edu


Nima ArkaniHamed’s research in theoretical physics is driven by attempting to address these mysteries. Much of his work has centered around addressing the hierarchy problem. Together with Savas Dimopoulos and Gia Dvali, he suggested that the extreme weakness of gravity can be attributed to the existence of large extra dimensions of space, perhaps as large as 100 microns in size, with the scale of quantum gravity lowered to the electroweak scale. This opens up the possibility that quantum gravitational effects can be probed at accelerators and even in tabletop experiments. In a different direction, together with Andy Cohen and Howard Georgi he has constructed models where (nongravitational) extra dimensions are generated dynamically from purely fourdimensional models. This has also led to new approaches to the hierarchy problem. He has also investigated the possibility that gravity is modified at large distances and times in an effort to address various cosmological problems. Most recently, together with Dimopoulos, he has explored the possibility that the finetunings for the cosmological constant and hierarchy problems find a common explanation within a huge landscape of possible lowenergy worlds that may exist in string theory, leading to a novel proposal for "split" supersymmetry at the large hadron collider.
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Recent Talks:
Public Lecture at Institute for advanced Study, October 26, 2012
2010 Messenger Lectures at Cornell University, October 4  8, 2010
 Setting the Stage:SpaceTime and Quantum Mechanics
 Our "Standard Models" of Particle Physics and Cosmology
 SpaceTime is Doomed: What Replaces It?
 Why Is There a Macroscopic Universe?
 A New Golden Age of Experiments: What We Might Know By 2020?
Selected Publications:
 N. ArkaniHamed, J.L. Bourjaily, F. Cachazo, A.B. Goncharov, A. Postnikov and J. Trnka, "Scattering Amplitudes and the Positive Grassmannian", hepth/1212.5605.
 N. ArkaniHamed, "The Future of Fundamental Physics", Daedalus, Vol. 141, Issue 3, Summer 2012, Science in the 21st Century, American Academy of Arts and Sciences, 2012.
 N. ArkaniHamed, J. L. Bourjaily, F. Cachazo, S. CaronHuot and J. Trnka, "The AllLoop Integrand for Scattering Amplitudes in Planar N=4 SYM", JHEP:1101,:041, (2011).
 N. ArkaniHamed, F. Chachazo, Cheung and J. Kaplan, "A Duality for the S Matrix", JHEP:03:020, (2010).
 N. ArkaniHamed, D. Finkbiner, T. Slatyer and N. Weiner, "A Theory of Dark Matter", Phys. Rev. D79:015014, (2009).
 N. ArkaniHamed and S. Dimopoulos, "Supersymmetric Unification Without Low Energy Supersymmetry and Signatures for FineTuning at the LHC", JHEP:0506:073, (2005).
 N. ArkaniHamed, A. G. Cohen, and H. Georgi, "Electroweak Symmetry Breaking from Dimensional Deconstruction", Phys. Lett. B 513, 232 (2002).
 N. ArkaniHamed, S. Dimopoulos, and G. Dvali, "The Hierarchy Problem and New Dimensions at a Millimeter," Phys. Lett. B 429, 263 (1998).