Experimental limits on kappa-Minkowski field theories

          @misc{ scivideos_PIRSA:08060176,
            doi = {10.48660/08060176},
            url = {https://pirsa.org/08060176},
            author = {Bolokhov, Pavel},
            keywords = {Quantum Fields and Strings, Particle Physics, Cosmology},
            language = {en},
            title = {Experimental limits on kappa-Minkowski field theories},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2008},
            month = {jun},
            note = {PIRSA:08060176 see, \url{https://scivideos.org/pirsa/08060176}}
          }
          

Abstract

The non-commutative kappa-Minkowski field theory, often tauted as a low-energy candidate for the quantum description of gravity, operates on a spacetime which possesses a modified Lorentz invariance, and as such can be probed in high-precision low-energy experiments. We study the first order corrections in kappa to the Standard Model, and show that they typically induce a coupling of nuclear spin to an external background at low energies. Strong limits on this type of interactions push the scale of non-commutativity to more than 10^7 Planck masses, thus exhibiting a severe naturalness problem for kappa-Minkowski Field Theory viewed as an effective description of quantum gravity.