出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：This paper presents viable scenarios in which we can check the possibility that neutral genuinely
elementary particles acquire a magnetic dipole moment at quantum-mechanical level and rather
than as a loop effect in Quantum Field Theory. We actually have in mind to evaluate the very
role of the spin for the magnetic properties of the particles, trying to disconnect spin from electric
charge. For that, we adopt the Dirac equation for the description of massive charged, neutral
or, eventually, self-conjugated (Majorana-like) fermions. We propose a sistematic study of nonminimal
electromagnetic couplings and their consequences, in the non-relativistic regime, on
the magnetic dipole moment generation for fermionic particles. The discussion sets out also in
situations where Lorentz-symmetry breaking takes place. The investigation is also pursued for
massive neutral vector bosons and we contemplate situations in which a non-trivial magnetic
moment appears already at the tree-approximation, despite the absence of an electric charge for
the particles under consideration.
