paper

Non-relativistic fields from arbitrary contracting backgrounds

arXiv:1512.06064 · doi:10.1088/0264-9381/33/17/175010

Abstract

We discuss a non-relativistic contraction of massive and massless field theories minimally coupled to gravity. Using the non-relativistic limiting procedure introduced in our previous work, we (re-)derive non-relativistic field theories of massive and massless spins 0 to 3/2 coupled to torsionless Newton-Cartan backgrounds. We elucidate the relativistic origin of the Newton-Cartan central charge gauge field and explain its relation to particle number conservation.

19 pages

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