Arkani-Hamed, NimaGeorgi, HowardCohen, Andrew G2016-09-092002Arkani-Hamed, Nima, Howard Georgi, and Andrew G Cohen. 2002. “Twisted Supersymmetry and the Topology of Theory Space.” J. High Energy Phys. 2002 (07) (July 8): 020–020. doi:10.1088/1126-6708/2002/07/020.1029-8479http://nrs.harvard.edu/urn-3:HUL.InstRepos:28368857We present examples of four dimensional, non-supersymmetric field theories in which ultraviolet supersymmetry breaking effects, such as bose-fermi splittings and the vacuum energy, are suppressed by (α/4π) N , where α is a weak coupling factor and N can be made arbitrarily large. The particle content and interactions of these models are conveniently represented by a graph with sites and links, describing the gauge theory space structure. While the theories are supersymmetric “locally” in theory space, supersymmetry can be explicitly broken by topological obstructions.en-USJournal Article2016-09-0910.1088/1126-6708/2002/07/020