<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics"^^ . "It is well known that the Standard Model is not complete and many of the theories that seek to extend it predict new phenomena that may be accessible in low-energy settings. This thesis deals with some of these, namely, novel spin-dependent interparticle potentials, axion-like particles and Lorentz-symmetry violation. In Part I we discuss the spin-dependent potentials that arise due to the exchange of a\r\ntopologically massive mediator, and also pursue a comparative study between spin-1/2 and spin-1 sources. In Part II we treat massive axion-like particles that may be\r\ncopiously produced in core-collapse supernovae, thus leading to a non-standard flux of gamma rays. Using SN 1987A and the fact that after its observation no extra gamma-ray signal was detected, we are able to set robust limits on the parameter space of axion-like particles with masses in the 10 keV - 100MeV range. Finally, in Part III we investigate the effects of Lorentz-breaking backgrounds in QED. We\r\ndiscuss two scenarios: a modification in the Maxwell sector via the Carroll-Field-Jackiw term and a new non-minimal coupling between electrons and photons. We are able to set upper limits on the coefficients of the backgrounds by using laboratory-based measurements."^^ . "2017" . . . . . . . "Pedro"^^ . "Cavalcanti Malta"^^ . "Pedro Cavalcanti Malta"^^ . . . . . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics (PDF)"^^ . . . "PhD_PC_Malta.pdf"^^ . . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics (Other)"^^ . . . . . . "small.jpg"^^ . . . "Spin-dependent potentials, axion-like particles and Lorentz-symmetry violation:\r\nbeyond the Standard Model phenomenology at the low-energy frontier of physics (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #23260 \n\nSpin-dependent potentials, axion-like particles and Lorentz-symmetry violation: \nbeyond the Standard Model phenomenology at the low-energy frontier of physics\n\n" . "text/html" . . . "500 Naturwissenschaften und Mathematik"@de . "500 Natural sciences and mathematics"@en . . . "530 Physik"@de . "530 Physics"@en . .