PANTHEON : towards high-precision tests of the Pauli Exclusion Principle in nuclear reaction as a testbed of theories beyond the Standard Model

The PANTHEON project aims to test the Pauli Exclusion Principle (PEP) in nuclear reactions by searching for nuclear transitions prohibited by PEP in processes respecting the Messiah–Greenberg super-selection rule. The project aims at using the proton beam from the 3.5 MV Singletron accelerator of the Bellotti facility located at the Gran Sasso Underground Laboratory, to perform a measurement based on a test setup able to disentangle protons coming from the PEP-prohibited processes. The goal is to prepare a dedicated setup for future measurements to improve by orders of magnitude the limit on PEP violation established in previous studies and challenge theories beyond the Standard Model at a precision level presently unattained.