Department of Physics2024-11-0920021029-84792-s2.0-23044513811https://hdl.handle.net/20.500.14288/2713We argue that a spontaneous breakdown of local Weyl invariance offers a mechanism in which gravitational interactions contribute to the generation of particle masses and their electric charge. The theory is formulated in terms of a spacetime geometry whose natural connection has both dynamic torsion and non-metricity. Its structure illuminates the role of dynamic scales used to determine measurable aspects of particle interactions and it predicts an additional neutral vector boson with electroweak properties. © SISSA/ISAS 2002.pdfPhysicsJournal Article175277100041N/ANOIR00496