Possible solution to the main cosmological constant problem

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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28 pages, v4: final version to appear in PRD

Scientific paper

A modified-gravity-type model of two hypothetical massless vector fields is presented. These vector fields are gravitationally coupled to standard matter and an effective cosmological constant. Considered in a cosmological context, the vector fields dynamically cancel an arbitrary cosmological constant, and flat Minkowski spacetime appears as the limit of attractor-type solutions of the field equations. Asymptotically, the field equations give rise to a standard Friedmann-Robertson-Walker universe and standard Newtonian gravitational dynamics of small-scale systems.

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