Vector stability in quadratic metric-affine theories
نویسندگان
چکیده
In this work we study the stability of four vector irreducible pieces torsion and nonmetricity tensors in general quadratic metric-affine Lagrangian 4 dimensions. The goal will be to elucidate under which conditions spin-1 modes associated such vectors can propagate a safe way, together with graviton. This highly constrains theory reducing parameter space curvature part from 16 5 parameters. We also sub-case Weyl-Cartan gravity, proving that sector is only compatible an Einstein-Proca for Weyl vector.
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2022
ISSN: ['1475-7516', '1475-7508']
DOI: https://doi.org/10.1088/1475-7516/2022/09/044