# On energy-momentum and spin/helicity of quark and gluon fields

@article{Hehl2014OnEA, title={On energy-momentum and spin/helicity of quark and gluon fields}, author={Friedrich W. Hehl}, journal={arXiv: General Relativity and Quantum Cosmology}, year={2014} }

In special relativity, quantum matter can be classified according to mass-energy and spin. The corresponding field-theoretical notions are the energy-momentum-stress tensor T and the spin angular momentum tensor S. Since each object in physics carries energy and, if fermionic, also spin, the notions of T and S can be spotted in all domains of physics. We discuss the T and S currents in Special Relativity (SR), in General Relativity (GR), and in the Einstein-Cartan theory of gravity (EC). We…

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