Pin groups in general relativity

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There are eight possible Pin groups that can be used to describe the transformation behavior of fermions under parity and time reversal. We show that only two of these are compatible with general relativity, in the sense that the configuration space of fermions coupled to gravity transforms appropriately under the space-time diffeomorphism group.

Original languageEnglish
Article number021702
Number of pages6
JournalPhysical Review D
Issue number2
Publication statusPublished - 28 Jan 2020

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