Test of Quantum Mechanics with the MAJORANA DEMONSTRATOR: Pauli Exclusion Principle and Electric Charge Conservation

The Majorana Demonstrator is an array of p-type, point-contact Ge detectors searching for neutrinoless double-beta decay in Ge-76. Additional physics searches are performed, including tests of electric charge conservation (ECC) and Pauli Exclusion Principle (PEP). The ECC was tested by searching for the decay of the lightest charged lepton: an electron. The limit established by Majorana has improved by an order of magnitude over the previous best limit. The PEP was tested by searching for two types of PEP-violating processes involving a forbidden transition in a Ge atomic system. A search for PEP violation involving an electron introduced into the system by electron/positron pair production (classified as type I) in Majoranacalibration data has established the best limit from a terrestrial experiment. A second search involving a forbidden transition with a previously interacting electron (type III) using low background data has set the best limit in Ge. This talk will present new results from these searches.