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physics.gen-ph2026
Induced Couplings and Causal Bounds from Nondegenerate Dirac Lagrangians
Marcelo Netz-Marzola, David Vasak, Vladimir Denk +2
The standard Dirac Lagrangian is linear in the field derivatives and therefore has a vanishing Hessian. We identify the minimal null deformations of this Lagrangian that make the c…
gr-qc2026
Tidal Forces in the Presence of Torsion and Nonmetricity
Armin van de Venn, Marcelo Netz-Marzola, David Vasak +1
This work investigates how torsion and nonmetricity modify tidal accelerations in metric-affine gravity. We derive a projected deviation equation that generalizes the standard geod…