Nonlocal on-shell field redefinition for the standard-model extension

Ralf Lehnert
2006 Physical Review D  
This work instigates a study of non-local field mappings within the Lorentz- and CPT-violating Standard-Model Extension (SME). An example of such a mapping is constructed explicitly, and the conditions for the existence of its inverse are investigated. It is demonstrated that the associated field redefinition can remove b-type Lorentz violation from free SME fermions in certain situations. These results are employed to obtain explicit expressions for the corresponding Lorentz-breaking
more » ... pace eigenspinors and their orthogonality relations.
doi:10.1103/physrevd.74.125001 fatcat:touzxar6lvh3lj5h6ahkd6vyra