HyperCP sees no CP violation in hyperon decays


HyperCP has published a null result from a search for CP violation in Lambda and Xi hyperon decays. This result (UVa graduate student Tim Holmstrom's thesis), from about 15% of the data, is a factor of twenty more sensitive than the best previous result, and is constraining some supersymmetric models of the asymmetry. Analysis of the full dataset is being done by UVa graduate student Chad Materniak. See Phys. Rev. Lett. 93, 262001 (2004).