2003/07/23 by Kwong Lau, Lau, Kwong
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0307063
10 pages, 5 figures.Invited talk at the Richard Arnowitt Fest, Texas A&M University, College Station, April 5-8, 1998. Published in Proceedings of the Richard Arnowitt Fest, Relativity, Particle Physics, and Cosmology, edited by R. E. Allen, World Scientific, 1999
Flavor changing neutral currents (FCNCs) in the charm system are highly suppressed in the standard model (SM). The theoretical strategies used to suppress FCNCs induced by supersymmetry in the strange and beauty systems need not apply to the charm system. The charm changing neutral current decay D0-> mu+ mu- is studied phenomenologically in the framework of supersymmetric extensions of the standard model. It is found that the decay branching ratio can be enhanced to about 10-10, by having heavy non-degenerate supersymmetric strange or bottom quarks, with negligible effect on the strange and beauty FCNC processes. The D0 mixing rate also receives enhancement in these models, but is generally below the present experimental limit. The prospects for measuring D0-> mu+ mu- to 10-10 levels, a definitive signature of new physics beyond the SM, in the near future are discussed.