Funds from this grant support an effort by Assistant Professor Nicholas Hutzler at Caltech and Professor John Doyle at Harvard to build advanced instrumentation capable of detecting new fundamental particles through precision measurement of the distortions these particles cause to the distribution of electric charge in an electron.К Hutzler and DoyleХs primary detection strategy is to use intersecting lasers to create an electromagnetic ТlatticeУ that holds polyatomic molecules at a fixed point in space. The held molecules can then be measured for perturbations in their electrical charge. The approach has significant theoretical advantages over other methods. First, optical traps can hold neutral molecules and neutral molecules can be packed very denselyСcharged particles disrupt one another when they are too close togetherСallowing for more measurements to be made per unit of space. Second, holding molecules still, as optical trapping does, allows the molecules to be measured for thousands of times longer than efforts using molecules in motion. While other experiments of this type aspire to laser-cool diatomic molecules, diatomic molecules have limits. They donХt offer the same powerful suppression of experimental noise as the molecules used in the leading experiments of this field. Polyatomic molecules should, however, and this experiment proposes using laser-cooled polyatomic molecules as an experimental platform with strong noise suppression and ultralow temperature via laser cooling. Both effects contribute to the promise of an ultraprecise measurement. The project will produce high-profile publications, talks, and posters at major conferences, and training for two postdoctoral and six Ph.D. students each year.