Speaker
Damianos Iosifidis
(University of Tartu, Scuola Superiore Meridionale)
Description
I will show how the Belinfante-Rosenfeld improvement terms, that render the energy-momentum tensor symmetric, emerge by coupling the matter to the affine-connection. In this sense the improvement terms correspond to the hypermomentum of matter. I will show how this is realized in two standard examples, the Maxwell field and the Dirac field. I will also show how the connection-matter couplings can also result in a traceless energy tensor when the theory is invariant under frame rescalings, by revisiting the known example of a comformally invariant scalar field. Generalizations to higher derivative theories will also be discussed
Authors
Anastasios Petkou
(Aristotle University of Thessaloniki)
Damianos Iosifidis
(University of Tartu, Scuola Superiore Meridionale)
Konstantinos Siampos
(Aristotle University of Thessaloniki (GR))
Manthos Karydas
(Lawrence Berkeley National Laboratory)
