30 citations · 41 across the 4 of their papers we have counts for
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hep-th2022
Explicit Diffeomorphism Breaking, No-go Conditions, and the Gravity Sector of the SME
Robert Bluhm
A brief recap is given of issues that can occur when fixed nondynamical backgrounds that explicitly break diffeomorphism invariance are included in gravity theories. Implications f…
hep-th2016★ 30 cited
Noether identities in gravity theories with nondynamical backgrounds and explicit spacetime symmetry breaking
Robert Bluhm, Amar Sehic
Gravitational effective field theories with nondynamical backgrounds explicitly break diffeomorphism and local Lorentz invariance. At the same time, to maintain observer independen…